FragRush — Break, Blast, Bury

A fast, fully destructible arena shooter that runs in your browser. Jump in, no accounts, no setup: fight bots in a neon-lit voxel arena, a sunny meadow of treehouses, a creek and a lake, a dark volcanic valley cut by a creek of lava, a snowy valley around a frozen lake with an ice castle, a moon base of glass domes in low gravity, a giant kid's room where you are a tiny robot, an abandoned fireworks factory at night, or islands floating above a sea of clouds. Almost every wall, tree and bridge can be blown apart, and whatever collapses buries whoever stands below.

▶ Play now: https://erenciracioglu-dotcom.github.io/FragRush/

In the spirit of Quake 3 and Unreal Tournament: free-for-all deathmatch against bots, instant respawn, rocket jumps, bunny hops and dashes. Hiding doesn't work for long, because cover doesn't last.

How to play

Key	Action
WASD	move
Space	jump (hold to bunny hop); hold it with forward at a ledge up to 1.8 m (crater rim, rubble, crate, lake bank) to climb it; in deep water: swim up, hold at the surface to tread water
Shift	dash
C	crouch, slide while running; in deep water: dive
Left click	fire
Right click	zoom (railgun)
1-5 / wheel / Q	select weapon / previous weapon
Tab	scoreboard
Esc / P	menu (pause; Leave match returns to the main menu); in menus: back, on the main menu: resume
Enter	play / resume
F3	FPS and performance overlay

Rocket jump: fire a rocket at your feet and jump at the same moment.

First to 25 frags (or the leader after 10 minutes) wins, then a fresh arena is generated.

Ctrl is not bound to anything: in Chrome, Ctrl+W closes the tab (crouch used to be on Ctrl too).

Maps

Pick the map on the main menu: MEADOW, VOLCANO, FROZEN LAKE, MOON BASE, TOY ROOM, FIREWORKS, SKY ISLANDS, ARENA or ROTATE (the default; changes after every match: toy room, fireworks factory, sky islands, volcano, moon base, frozen lake, arena, meadow, ...). NEW ARENA rebuilds the chosen map with a new layout seed. URL override for testing: ?map=meadow, ?map=volcano, ?map=frozen, ?map=moon, ?map=toyroom, ?map=fireworks, ?map=sky or ?map=arena.

• Arena: the original neon sunset arena: central tower, four forts, bridges, corner yards.
• Meadow: a sunny afternoon in a valley ringed by cliffs. A great oak in the middle carries a wide treehouse deck and, at the very top, the lookout where the Doomsday Orb appears (four jump pads, or a rocket jump). Three more treehouses (lookout, creek house, lake house) hang on big trees and are joined to the oak by plank bridges; every treehouse has a spiral staircase and a jump pad. A creek springs from a cave in the west cliff and winds into a small lake; there is a dock, a diving board from the lake house, footbridges, a hunter's stand, boulders, logs and bushes. Everything is voxels and breaks: cut a trunk and the crown (and whoever is in the treehouse) comes down. Only the cliff core and the bedrock are indestructible.

• Volcano: the meadow's dark twin, at night under a sky of ash with a volcano erupting on the horizon. No trees: an obsidian spire stands in the middle with a wide stone deck and, at the very top, the lookout ring where the Doomsday Orb appears (four jump pads, or a rocket jump). Three basalt towers with stone huts and spiral staircases are joined to the spire by iron grate bridges, each with its own jump pad, and a watch hut stands on basalt legs. A narrow creek of lava runs from a cave in the west cliff into a small, shallow lava pond (together a little under a third of the meadow's water surface); three natural basalt arches cross the creek. The Mega Health waits on a basalt islet in the middle of the pond: two obsidian stepping stones lead there, one careless jump and you burn. Obsidian crystals, basalt column fields, glowing magma cracks, steaming vents and braziers fill the valley; embers drift and ash falls. Everything breaks except the cliff core and the bedrock.

• Frozen Lake: a snowy valley on an overcast winter afternoon, snow falling, the lake in the middle frozen over. On an island in the lake stands an ice castle: a low crenellated wall with four gates and four turrets with braziers on top, and in the middle an ice-brick keep with a spiral staircase around it, up to the lookout where the Doomsday Orb appears (four jump pads on the shore, or a rocket jump). A wooden footbridge runs from the south gate to the shore. Around the lake: two log cabins with smoking chimneys, a hunter's stand on stilts, a pier with a fishing hole cut in the ice (the Mega Health lies on the lake bottom below it), snowy pines, boulders, fallen logs, snowdrifts and snowmen. A frozen creek comes out of a cave in the west cliff. Icicles hang from the eaves, the turrets and the lookout. Everything breaks except the cliff core and the bedrock.

• Moon Base: a base of glass domes on the floor of a large crater, under a black, starry sky with the half-lit Earth hanging above the horizon; the sun is low and harsh and casts long, sharp shadows. Gravity is about a third of normal: you jump more than twice as high, rocket jumps go nearly three times as high and carry you over the domes, and debris drifts down slowly. Four domes are joined by pressurized tube corridors: a greenhouse with a tree, planting beds and pink grow lights, a command center with a map table and glowing screens, a habitat with a dining table, bunk beds and a kitchen, and a lab with benches of sample tubes and a moon rock on a pedestal. Their doorways are force fields that let you and your shots through but hold the air in. Between the domes stands a comms tower: the Doomsday Orb appears in its dish (three jump pads around the tower, or a rocket jump), and steps on its east face lead halfway up. North of the base lies a field of solar panels you can walk under; to the east a narrow canyon cuts across the map, crossed by a steel bridge, and beyond it are the landing pad and a lander you can climb. Containers, a six-wheeled rover, fuel tanks, craters and boulders give cover. The Mega Health waits under the tree in the greenhouse. Everything breaks except the crater rim and the bedrock.

• Toy Room: you are a tiny robot (about 18 cm tall) in a giant kid's room, about ten times life size: the 7 × 7 m room is 70 × 70 m. Daylight falls through a wide window with the curtains drawn aside, in shafts of light full of floating dust. On the north wall a bookshelf is the climbing route (the shelves and the stacks of books sticking out of them are the steps), and from its top a ruler bridges over to the 20 m wardrobe, where the Doomsday Orb waits (or take one of the two jump pads). The bed is a giant trampoline: the mattress, the duvet, the pillows and a rubber ball throw you back up. You can walk under the bed, and the Mega Health lies there. Next to it a nightstand with a night light, toy blocks to climb onto the bed and a giant crayon leaning on it; across the room a desk with a lamp, a pencil cup and books, and a chair. In the middle a rug with a printed race track, ramps and toy cars; in the corners a toy castle, a toy chest, a teddy bear and a city of blocks. From the castle gate a line of 22 giant dominoes curves across the floor to a 13 m tower of wooden blocks: knock over the first one and the last one brings the tower down. The inner layer of the walls and the ceiling (wallpaper, plaster) breaks, the brick behind it doesn't.

• Fireworks: an abandoned fireworks factory at night, under a navy sky with stars, a moon and a city glow on the horizon; now and then a show bursts far away beyond the hills. In the middle stands a 16.5 m brick and steel firework tower, wrapped one and a half times by a steel staircase, with a test-firing platform, mortar tubes and the Doomsday Orb on top. Brick workshops line three sides (wooden roofs, windows, workbenches and crate racks inside), two low concrete powder stores sit in opposite corners (thick doors, warning signs, powder kegs), and the yard is full of firework crates stacked on pallets, hand carts, a loading ramp, a water tower and chains of paper lanterns strung around the tower. Steel catwalks link the roofs to the tower stairs, and three jump pads throw you to the middle of the tower and onto two workshop roofs. Three powder fuses run from red posts to the stores; one climbs a shed wall and comes down its roof.

• Sky Islands: islands floating above a sea of clouds at sunset. In the middle, the main island with an observatory and a lookout tower; the Doomsday Orb waits on top of the tower. Around it, five smaller islands: a garden with a pond whose waterfall pours into the clouds (north), a windmill (east), a village house (south), ruins of columns (west) and a crystal quarry (northeast). Three rope bridges and a stone arch link the main island to its neighbours, floating cloud stones serve as stepping stones, and jump pads fly you from island to island. Every island hangs from a glowing crystal underneath it: break the crystal and the island drops into the clouds.

Water (meadow)

Every empty voxel below the water level is water: the creek, the lake, and any crater you blast down to that depth. The water you see and the water you move through are the same.

• Creek (about 0.5 m deep): you wade, slower the deeper you are (about 60 % of running speed), jumps and dashes are weaker. You can still shoot.
• Lake (up to about 3 m): you swim at about 40 % of running speed, in the direction you look. You slowly sink unless you hold Space; holding Space at the surface keeps your head above water. C dives. Swim into the shore near the surface to climb out (banks up to 1 m), or walk out on the shallow beaches.
• Head under water: no shooting. The weapon is lowered and the crosshair dims.
• Air: 12 seconds (the AIR meter appears under the crosshair). After that you take damage every second (10, 15, 20, ... ignores armor). Drowning is a self frag (−1). Surfacing refills the air at once.
• The Mega Health lies at the bottom of the lake: dive for it, but you can't shoot down there.
• Rockets that explode in or near the water raise a water column with rings, a flash and a gas bubble seen from below; bullets and projectiles splash where they cross the surface. Underwater the sound is muffled. Surfacing leaves drops and a draining film on the lens.
• Bots wade the creek, avoid deep water, never fire while submerged and swim back to the nearest shore if they end up in the lake. They ignore the Mega Health on the lake bottom.

Lava (volcano)

Every empty voxel below the lava level in the creek, the pond and right next to them is lava: blast a crater that deep within about a meter of the lava and it fills with lava; craters further away stay dry. Blast the ground away beside the lava and it does not drain: it stands at its level as a glowing wall of lava at the edge of the crater. The lava you see is the lava that kills.

• Touching lava kills instantly, armor or not. Fall in on your own and it counts as a self frag (−1).
• Push someone in and the frag is yours ("INTO THE LAVA!"): whoever hit them in the last 4 seconds, with a rocket blast or anything else, gets the credit.
• The lava lights the banks around it, embers rise from it, bubbles pop and you can hear it rumble when you get close.
• Bullets stop at the surface and at lava walls, rockets and plasma bolts explode on them with a splash of lava, rail shots splash through. Items that fall in burn and come back at their spot later; debris melts.
• Bots keep away from the edge: they don't run, jump or dash toward the lava, brake when their momentum would carry them in, and cross on the arches and bridges. They ignore the Mega Health on the islet. They can still be blasted in.

Ice (frozen lake)

The lake is covered by ice half a meter thick, and the water under it is freezing. As on the meadow, every empty voxel below the waterline is water.

• The ice breaks: rockets and plasma punch holes in it, bullets chip it. It is slippery: you pick up speed slowly and slide a long way before you stop.
• Freezing water takes health every half second (5, 6, 7, ... up to 12, ignores armor) and the screen frosts over. Get out fast.
• Break the ice under someone and the frag is yours ("THROUGH THE ICE!"): if they fall through ice you broke in the last 3 seconds and freeze or drown within 14 seconds, you get the credit. Fall in on your own and it counts as a self frag (−1).
• The ice is a ceiling: under it you can't come up for air. Find a hole, or hold Space under the ice for about a second to break through from below.
• Broken ice freezes over again from the edges inward, surface first: a rocket hole can be walked on again after about 15 seconds and is solid in under a minute. Floes cut loose float. The fishing hole at the end of the pier never freezes.
• Icicles: shoot one at the root and it breaks off; it hurts whoever stands below (bigger ones hurt more) and the damage is yours ("ICICLE DROP!").
• Snowmen hide armor, health or ammo inside: blast one open to find out. Bots don't know.
• Bots walk across the ice and path around the holes. If they fall in, they swim for the nearest edge; trapped under the ice, they break through from below.

Air (moon base)

Each dome, together with its entrance corridors, and each tube corridor holds its own air. Outside there is none.

• Low gravity: about a third of normal. Jumps go more than twice as high (about 2.7 m) and hang in the air, rocket jumps nearly three times as high (over the domes), and debris and dust fall slowly.
• The glass breaks: a stray bullet only cracks a pane; a few more hits, one rocket or one plasma bolt punch a hole, and the glass around the hole bursts.
• Air leak: once a dome or tube is open to the vacuum, its air rushes out for 3–4 seconds. Everything inside (players, bots, items, debris, smoke) is pulled toward the nearest hole, lifted off the floor and blown out into the low gravity. Red alarm lights flash, a horn blares, vapor and ice crystals jet from the hole. Get away from the hole: the pull is strongest close to it.
• Damage: going out through the hole costs 35 health, and slamming into something at speed hurts.
• Blow someone out and the frag is yours ("SPACED!"): whoever dies within 6 seconds of your breach from the decompression, the blow-out or the impact is credited to you. Die in a dome you breached yourself and it counts as a self frag (−1).
• Foam patch: about 25 seconds after the breach the hole is sealed with foam (it waits while someone stands in the hole) and the dome fills with air again. The foam can be shot through again.
• Vacuum: outside, sound is muffled and smoke doesn't linger; inside, the air vents hum and the consoles beep.
• Bots know the low gravity: they predict where their jumps land and use the long jumps it allows. When they see an enemy through the glass of a dome that still holds its air, they shoot the glass (preferring rockets, plasma and the railgun), and when the air starts to leak they run against the flow, away from the hole.

Toys (toy room)

• Trampolines: the mattress, the duvet, the pillows and the rubber ball are bouncy. Land on them fast enough and you bounce back at about 80 % of your landing speed; hold Space as you land for an extra push (up to about 5 m high). The bounces die down, and a gentle step doesn't bounce.
• Dominoes: 22 giant dominoes (2 m tall) stand in a curving line from the castle gate to the block tower. Shoot the first one: each domino tips over on its bottom edge, speeds up and knocks over the next, the wave reaches the end in about four seconds, and the last domino tips the 13 m tower over its front edge like a falling tree onto the rug.
• The dominoes are heavy: the first one falls at a single hit, the others only rock when a stray bullet hits them (a few pulse rounds, a close shotgun blast, two plasma bolts, a rail slug or a rocket knock one over). A domino falls away from whoever knocks it over, so hitting one from the tower side sends the wave back to the start. A domino shot while a wave is running toward it falls the same way as the wave, so crossfire doesn't cut the line.
• DOMINO!: whoever the tower crushes or catches as it slams down, and whoever a falling domino lands on (40 damage, and a shove), is credited to the player who knocked over the first domino of that run. Get crushed by your own tower and it counts as a self frag (−1). A warning shows when you stand where the tower will fall while the line is running.
• Reset: about 45 seconds after a run starts, the dominoes stand up again (a domino waits while someone stands in its place) and the tower rebuilds itself layer by layer. A shot-up tower repairs itself too, and every match starts with the line set up.
• Bots know the room: they bounce on the bed without getting stuck and climb the bookshelf to the orb. When an enemy stands where the tower would fall (and isn't just passing through), a bot that can see a domino shoots it: the first one, or one near the tower that falls the right way and brings the tower down within two seconds. When a line is running, the bots that notice get out of the way.
• The wall clock ticks (real time), birds chirp outside, a music box plays as the match starts, rubber toys squeak, the blocks and dominoes clatter (all synthesized).

Fireworks (fireworks factory)

• Firework crates: a crate catches fire when the hits on it add up (two pulse rounds do it) or when something blows up next to it. It fizzes for a moment, then explodes (100 damage at the centre, 3.5 m), and the crates around it catch fire one after another, so a stack goes up in a rolling wave. Every explosion throws three to six shells into the sky that burst 8–15 m up as peonies, chrysanthemums or willows; about one in three is a dud that falls back, blows up where it lands and can light another crate.
• Fuses: shoot a red post (or the start of its fuse), or blast next to it, and a spark runs along the powder fuse at 2.5 m/s, burning it away as it goes. Shoot the fuse ahead of the spark to cut it: the spark dies at the gap. At the end of the fuse the powder store fizzes for a second and then goes up in the biggest blast on the map (7.5 m).
• CHAIN!: every frag of a chain (crates, shells, duds, fuses and stores alike) is credited to whoever started it, with CHAIN! / CHAIN x2! in place of the usual multi-kill message. Die in your own chain and it counts as a self frag (−1).
• Restock: crates come back 40–60 seconds after they blow up (not while someone stands in their place), fuses and stores after 75–90 seconds, and every match starts fully stocked. Nothing comes back floating: the crater under a returning crate (and up to 1 m around it), fuse or red post is first filled back in with the original ground, and a crate whose roof has been blown away stays gone.
• Bots use the yard: when an enemy stands next to a crate a bot can see, it shoots the crate, and it doesn't fire at a crate (or a stack) it is standing next to.
• Distant shows thump beyond the hills, crates fizz and bang, shells whistle and crackle (all synthesized).

Islands (sky islands)

• Crystals: every island floats on a glowing crystal hanging underneath it (the small islands take 900 damage, the main island 1800). Hits and blasts near a crystal wear it down; at 75 %, 50 % and 25 % it cracks further, its light flickers, its cracking sound rises in pitch and the island shakes.
• Island drop: when the crystal breaks, the island shakes hard and creaks for 2.5 seconds (the time to get off), then drops into the clouds in one piece with everyone still on it.
• Clouds: fall below the clouds and you die. Whoever goes down with an island is credited to the player who broke its crystal (ISLAND DROP!); whoever falls within 4 seconds of being hit by an enemy is credited to that enemy (INTO THE CLOUDS!). Fall on your own, or drop the island you are standing on, and it counts as a self frag (−1).
• Return: about 45 seconds later the island rises out of the clouds in 4 seconds and is written back exactly as it was built: crystal at full strength, bridges repaired, items back. Anyone in its way is pushed up.
• Regrowth: an island that is still up heals itself. Two seconds after a blast the hole starts filling in from its edges, layer by layer, with the original rock, grass and buildings: a rocket hole is gone 3–4 seconds after the blast, a Doomsday crater within about 15 seconds, and even an island blasted almost to nothing grows back from its core in under 20 seconds as long as its crystal holds. Anyone standing in a filling hole is lifted out, never buried. The stepping stones heal the same way.
• Doomsday rockets carve only twice as wide as a rocket here (5 m instead of 12.5 m): the big crater wiped out a whole island in one shot. Their kill radius is unchanged.
• Jump pads to a dropped island are off until it is back, and so is a pad whose landing spot has been blown away. You only respawn on islands that are up and not about to drop, and never over a hole.
• Bots treat the edges like lava: they don't run, jump or dash where they would land in the clouds, don't fire rockets at close range near an edge, get off an island whose crystal is breaking, and, when they can see it from another island, shoot the crystal of the island their enemies stand on if it is weak or they carry a rocket launcher or a railgun. In test matches about one bot per match fell on its own.
• Crystals crack and shatter, a falling island rumbles and the clouds whoosh as it sinks, and it comes back up with a low roar (all synthesized).

Weapons

1. Pulse Rifle: rapid fire, slowly carves through walls
2. Shotgun: close range, shreds cover
3. Plasma Gun: fast bolts with small blasts, great for drilling concrete
4. Rocket Launcher: big craters, brings structures down, rocket jumps
5. Railgun: pierces up to 14 m of wall and hits whoever is behind it

Doomsday Orb

Spawns on the roof of the central tower, reachable only with jump pads or a rocket jump. For 15 seconds every hit kills: every pulse bolt, every shotgun pellet, every plasma bolt, every rail. Rocket blasts become 5× larger (≈12 m craters, ≈21 m damage radius; on the sky islands the craters are only 2× larger). Your own blasts throw you around but don't hurt you.

No camping

• Bots hear gunfire, come to where you were last seen and blast through the cover between you.
• Stay in the same small area for more than 15 seconds and your position is revealed: the three nearest bots learn where you are and come to break your cover (you get a warning at 10 s).
• Walls, columns and bridges break. Anything that loses its connection to the ground collapses and crushes what is below. Bring a ceiling down on an enemy and the frag is yours ("BURIED IN RUBBLE").

Settings

Map (main menu), language (English / Türkçe), mouse sensitivity, field of view, graphics quality (Ultra / High / Medium / Low), bot count (0-11, 3 by default, can be changed mid-match), bot difficulty (7 levels from Rookie to Nightmare; Rookie by default), volume, invert mouse, FPS overlay. Three of the bots are family: Papa Eren, Eray the Kid and Mama Aigul.

Requirements

• A desktop browser with WebGL 2. Chrome or Edge recommended (tested in Chrome).
• Mouse and keyboard. Mobile is not supported.
• A dedicated GPU is recommended. Unless you pick a quality yourself, the game starts on Low on integrated graphics, Medium on older dedicated GPUs and High on RTX / Radeon RX 5000+ class GPUs; change it in Settings (press F3 to see FPS).
• The first match shows a short controls card (H hides it; it appears only once).
• No install, no downloads. The online version counts anonymous visits with GoatCounter (no cookies, no personal data); local copies don't.
• Play with a friend (new, beta): the menu button PLAY WITH A FRIEND opens a room and gives you a link; up to 3 friends join from their own browsers and fight in the same destructible map (every map works; when a match ends the next map in the rotation loads for everybody). The host's browser runs the match and the game data flows directly between the browsers (WebRTC). A small room server (a Cloudflare Worker) is contacted only to introduce the browsers to each other: it sees the room code, your display name and the connection details, stores nothing and relays no game data. If you never press the button there is no network use after the page has loaded; everything, including all sound, is generated in the browser. The CrazyGames build has no multiplayer code at all.

If the picture freezes every few seconds, update your graphics driver. On the test laptop (Intel integrated graphics + RTX 5080), Intel driver 32.0.101.6629 (February 2025) froze the picture for 0.3–0.8 s every 6 seconds whenever anything was animating: the game, a page with nothing but a CSS animation, and a small native Direct3D test program alike. Intel driver 32.0.101.9150 (October 2026) fixed it.

Laptops: if the game runs slowly, the browser is probably on the integrated GPU (the menu shows a warning when it is). On Windows, set the browser to "High performance" in Settings → System → Display → Graphics and restart the browser, or use the launcher below. Laptops with a MUX switch can also be set to "dGPU only".

Run locally

The whole game is a single file: docs/index.html. You can open it directly in Chrome.

Windows launcher: FragRush.bat starts a small local server (if Node.js is installed) and opens the game in a separate fullscreen Chrome window on the high-performance GPU. The server closes itself about 45 s after the game window is closed.

From source:

npm install
node build.mjs      # builds dist/index.html and docs/index.html
node serve.mjs      # http://127.0.0.1:8777/

CrazyGames build: node build.mjs --portal crazygames builds the version for the CrazyGames portal (with their SDK, without the visit counter). It opens on a start screen over the live toy room instead of the main menu: one click (or Enter / Space) starts a match, Esc opens the menu with maps and settings. Add ?direct to a local URL to try the start screen.

Performance

Measured on an RTX 5080 Laptop at 2560×1362, Ultra:

• ~240 FPS average, 99th percentile frame time 8 ms.
• 30 seconds of non-stop Doomsday rockets (one per second, the arena almost completely leveled, ~380k voxels removed): worst frame 12 ms, no frame over 20 ms.
• 5-minute heavy-destruction soak tests: stable memory (no leaks), no shader compiles during play.
• On most hybrid-graphics laptops the built-in screen is driven by the integrated GPU even when the game renders on the dedicated one, so keep the integrated GPU's driver up to date as well. "dGPU only" (MUX) mode takes the integrated GPU out of that path.

Benchmark page: ?bench=30&q=ultra (local server, writes results to reports/), add &map=meadow, &map=volcano, &map=frozen, &map=moon or &map=toyroom for the other maps (on the moon base, &breach breaches a dome every 4 seconds; in the toy room, &domino sets up the line and runs it into the tower every 7 seconds).

The meadow is heavier than the arena (more triangles in trees and grassy slopes, plus water). On the test laptop's integrated GPU (Intel Graphics 0x7D67, Chrome/ANGLE D3D11, Low quality, 1104×561, 25 s bot-following benchmark with large blasts): arena ~207 FPS (GPU 4.2 ms/frame), meadow ~134 FPS (GPU 6.4 ms/frame). Measured at fixed views with GPU timer queries, the water (per-frame wave/foam updates + drawing) costs about 0.9 ms per frame at Low on that GPU, and drawing it about 1.1 ms at High (1578×802). The underwater and lens passes run only when the camera is at or below the waterline or the lens is wet, and ambient occlusion is switched off while fully underwater.

The volcano sits between the two: it has no trees but adds the lava surface, its glow on the voxels and embers. The frozen lake is close to the meadow: snowy slopes and pines, the ice, snowfall, and the water under the holes is drawn by the same water pass. Run back to back on the same integrated GPU at Low in a larger window (1563×831), the arena averaged 115 FPS (GPU 7.5 ms/frame), the volcano 84 FPS (10.4 ms), the frozen lake 71 FPS (12.4 ms) and the meadow 66–79 FPS (11.4–13.5 ms over two runs; the slower one had twenty structures collapsing in view). The bots follow a different path in every run, so what gets blasted and how much falls varies. Measured the same way later, the moon base averaged 85 FPS (GPU 10.7 ms/frame). A worst-case run that breached the nearest dome with a plasma bolt every 4 seconds (&breach) averaged 90 FPS, and no frame took longer than 20 ms. The toy room averaged 101 FPS (GPU 8.8 ms/frame); a worst-case run that rebuilt the block tower (about 2,200 voxels written at once) and ran the whole domino line into it every 7 seconds, with the camera taking in the whole room (&domino), averaged 93 FPS, and no frame took longer than 16 ms. The fireworks factory averaged 131 FPS (GPU 7.2 ms/frame); a worst-case run that restocked the yard and set off every crate, both powder stores and the fuses every 14 seconds, with the camera taking in the whole yard (&chain), averaged 128 FPS, and no frame took longer than 18 ms (the toy room averaged 115 FPS in the same session). In a later session in which the machine ran every map at roughly a third of its earlier speed (the toy room averaged 42 FPS there), the sky islands averaged 47 FPS (GPU 11.6 ms/frame), as fast as the fireworks factory in the same session, and a worst-case run that broke an island's crystal every 9 seconds, the main island first, with the camera circling the islands (&drop), averaged 46 FPS. Back at full speed in another session (toy room 105 FPS), the sky islands averaged 150 FPS (GPU 5.7 ms/frame) and the fireworks factory 124 FPS; a worst-case run that carved a Doomsday-size crater into every island every 8 seconds, so that the islands were regrowing the whole time (&grow), averaged 126 FPS, and no frame took longer than 20 ms.

How it works

• Three.js r186 + WebGL 2, bundled with esbuild into one self-contained HTML file (~1.5 MB).
• Voxel world: 72 × 24 × 72 m at 25 cm resolution (~8 million cells). Each material has its own toughness and per-voxel damage: concrete cracks and darkens before it breaks, steel holds longer, wood and glass break easily. Bedrock and the outer frame are indestructible.
• Meshing: greedy meshing with per-vertex ambient occlusion in 6 Web Workers. Changed chunks are re-meshed nearest-to-camera first; GPU buffers are allocated with headroom and updated in place, and new allocations are spread over frames so huge blasts don't stall the driver.
• Structural integrity: after each blast, islands that lost their connection to the ground are found with a downward-biased flood fill (~2 ms), fall as rigid bodies and break into debris and rubble on impact.
• Rendering: sunset sky and environment map, 4K shadow map, N8AO ambient occlusion, bloom, AgX tone mapping, color grading, SMAA, per-voxel color variation, bevels and material patterns, instanced particles and debris, a fixed-size dynamic light pool (no shader recompiles). All shaders are compiled up front.
• Bots: multi-level navigation grid that updates as the arena is destroyed (a node stands on the highest ground within one step of its cell, so slopes and drifts are walkable), A* pathfinding, target selection, strafing, jumping, dashing, rocket dodging, jump pads. When stuck they drill through walls. Near lava they trace where their run, jump or dash would end (steps, drops, the arc of a jump) and brake or turn away before it ends in the lava.
• Audio: fully synthesized with WebAudio at runtime (no sound files), 3D positioned with reverb.
• Water (meadow): water.js (our own WebGL2 water library, vendored as one file) drawn inside the Three.js post-processing chain with raw WebGL calls: the surface is drawn after AO with refraction from a half-resolution copy of the scene, a creek flow map and interactive ripples; an underwater pass (only when the camera is at or below the waterline) applies water absorption, scattering, caustics and the explosion flash to the scene from the depth buffer; a lens pass adds drops and the waterline. water.js's physical sky is converted once into a Three.js cube map for the background and the lighting environment, so the sky, the reflections in the water and the lighting of the voxels match.
• Lava (volcano): one rule everywhere: an empty voxel below the lava level inside the lava area (creek and pond plus a 1.25 m margin) is lava. Drawing, the kill check, bullets, projectiles, items, debris and the bots' navigation all use it. The surface is a flat mesh over that area with its own shader (a crust of moving cells with glowing cracks, carried along a flow map, cooler at the banks); a low-resolution proximity map lights nearby voxels from below. Where the ground beside it is blasted away, the exposed sides of the lava are drawn as walls, rebuilt as the terrain changes. The night sky (ash clouds, the distant volcano with lava streaks and a glowing plume) is a shader, also baked into the environment map for reflections. The lava's rumble, bubbles and sizzle are synthesized too.

src/            source (src/config.js: all tunables in one place)
  world/        voxel world, materials, mesher (+ worker), map generators (arena, meadow, volcano, frozen lake, moon base, toy room, fireworks factory, sky islands), levels, voxel shader
  game/         game loop, movement (incl. swimming, ice, per-map gravity, trampolines), weapons, bots, destruction, items, navigation, domino chain, sky-island bots
  fx/           sky, post-processing, water bridge, lava, ice and snow, moon base (sky, air leaks), toy room (dominoes, block tower, window light), fireworks factory (crates, fuses, shells, night sky), sky islands (crystals, island drops, clouds), environments, particles, debris, lights
  vendor/       water.js
  audio/ ui/    sound synthesis, HUD
docs/           built single-file game (served by GitHub Pages)
serve.mjs       dependency-free local server
build.mjs       build script
test/           headless tests (movement, world, water, meadow, volcano, frozen lake, moon base, toy room, fireworks factory, sky islands, network, flows, screenshots)
tools/          benchmark scripts

Status

Proof of concept, built with Claude. Bots, plus a beta multiplayer mode (host + up to 3 friends on every map). Water does not flow: blasting a lake bank does not drain the lake, and a deep crater anywhere fills with water from the water table. Lava does not flow either: where it can be is fixed when the map is built, so digging under it leaves a standing wall of lava. Air is simplified too: it follows a precomputed field toward the holes rather than a fluid simulation, and an opened dome empties in a few seconds whatever the size of the hole. The dominoes are simplified as well: they only tip along the line (a blast knocks one forward or back, never sideways), and the block tower always falls the same way. A falling sky island is one rigid body that only tumbles slightly, and it always comes back exactly as it was built; an island that stays up always regrows the shape it was built with. Weapon models and robots are simple procedural boxes. Very large structures (over 160k voxels) are treated as fixed and don't fall. Sound starts after the first click (browser rule).

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Türkçe

FragRush, tarayıcıda çalışan, neredeyse her şeyin parçalanabildiği hızlı bir arena FPS'i. Hesap yok, kurulum yok: gir, neon ışıklı voxel arenada botlarla kapış, duvarları, kolonları, köprüleri havaya uçur, çöken binaların altında rakiplerini göm.

▶ Hemen oyna: https://erenciracioglu-dotcom.github.io/FragRush/

• Quake 3 / Unreal Tournament ruhu: herkes herkese karşı, ölünce anında yeniden doğuş, roketle zıplama, tavşan zıplaması, atılma. 25 parçalamaya ulaşan (ya da 10 dakika sonunda önde olan) kazanır, ardından yeni bir arena kurulur.
• Dil: oyun İngilizce açılır; SETTINGS → Language ile Türkçeye geçilir (seçim hatırlanır).
• Haritalar: ana menüde ÇAYIR, VOLKAN, BUZ GÖLÜ, AY ÜSSÜ, OYUNCAK ODASI, FİŞEKHANE, GÖK ADALARI, ARENA ya da SIRAYLA (varsayılan; her maçtan sonra değişir: oyuncak odası, fişekhane, gök adaları, volkan, ay üssü, buz gölü, arena, çayır...). Çayır: uçurumlarla çevrili güneşli bir vadi; ortada tepesinde KIYAMET küresinin çıktığı gözetleme yeri olan büyük bir meşe ve ağaç evi, köprülerle bağlı üç ağaç evi daha, uçurumdaki mağaradan çıkıp küçük bir göle akan dere, iskele, atlama tahtası, avcı kulübesi. Ağacı kesersen tacı (ve ağaç evindeki) aşağı iner. Volkan: çayırın karanlık ikizi; gece, kül bulutlarının altında, ufukta patlayan bir volkan. Ağaç yok: ortada tepesinde KIYAMET küresinin çıktığı gözetleme halkası olan obsidyen kule, demir ızgara köprülerle bağlı üç bazalt kule ve taş kulübeler, bazalt ayaklı gözcü kulübesi; batı uçurumundaki mağaradan çıkıp küçük, sığ bir lav göletine akan dar bir lav deresi ve üstünde üç bazalt kemer. Mega can göletin ortasındaki bazalt adacıkta (iki obsidyen basamak taşı, dikkatsiz bir atlayış ve yanarsın). Obsidyen kristalleri, bazalt sütunları, akkor magma çatlakları, duman tüten fümeroller. Buz Gölü: kar yağan, bulutlu bir kış öğleden sonrası; vadinin ortasındaki göl donmuş. Göldeki adada buz kalesi: dört kapılı alçak mazgallı sur, tepelerinde mangal yanan dört burç, ortada çevresinden sarmal merdiven çıkan buz tuğla kule ve tepesinde KIYAMET küresinin çıktığı gözetleme yeri (kıyıdaki dört zıplama pedi ya da roketle zıplama). Güney kapısından kıyıya tahta köprü. Kıyıda bacası tüten iki kütük ev, kazıklı avcı kulübesi, ucunda buzda balık deliği olan iskele (mega can altında, göl dibinde), karlı çamlar, kayalar, devrik kütükler, kar yığınları ve kardan adamlar; batı uçurumundaki mağaradan donmuş bir dere çıkar. Saçaklardan, burçlardan ve gözetleme yerinden sarkıtlar sarkar. Ay Üssü: büyük bir kraterin tabanında cam kubbelerden kurulu bir üs; yıldızlı siyah gökte yarısı aydınlık Dünya asılı, alçak ve sert güneş uzun, keskin gölgeler düşürür. Yerçekimi normalin üçte biri kadar: iki kattan fazla yükseğe zıplarsın, roketle zıplama neredeyse üç kat yükseğe atar ve seni kubbelerin üstünden aşırır, enkaz ağır çekimde düşer. Dört kubbe basınçlı tüp koridorlarla bağlı: ortasında ağaç, tarhlar ve pembe büyüme lambaları olan sera; harita masası ve ışıl ışıl ekranlarıyla komuta merkezi; yemek masası, ranzaları ve mutfağıyla yaşam modülü; numune tüplü tezgâhları ve kaidede ay kayasıyla laboratuvar. Kapılar seni ve mermini geçiren ama havayı tutan kuvvet alanları. Kubbelerin arasında iletişim kulesi: KIYAMET küresi çanağında çıkar (kulenin çevresindeki üç zıplama pedi ya da roketle zıplama), doğu yüzündeki basamaklar yarı yüksekliğe çıkar. Kuzeyde altından yürünebilen güneş paneli tarlası, doğuda haritayı kesen dar bir kanyon ve üstünde çelik köprü, ötesinde iniş pisti ve üstüne çıkılabilen iniş aracı; konteynerler, altı tekerlekli gezici araç, yakıt tankları, kraterler ve kayalar. Mega can seradaki ağacın dibinde. Krater kenarı ve ana kaya dışında her şey kırılır. Oyuncak Odası: dev bir çocuk odasında 18 cm'lik minik bir robotsun; oda gerçeğinin on katı kadar büyük (7 × 7 m'lik oda 70 × 70 m). Perdeleri iki yana toplanmış geniş pencereden, içinde toz zerreleri uçuşan ışık hüzmeleriyle gün ışığı girer. Kuzey duvarındaki kitaplık tırmanma yoludur (raflar ve raflardan taşan kitap yığınları basamaktır); tepesinden bir cetvel 20 m'lik gardıroba köprü olur, KIYAMET küresi gardırobun tepesinde (iki zıplama pedi de oraya atar). Yatak dev bir trambolin: şilte, nevresim, yastıklar ve lastik top seni geri fırlatır; yatağın altı yürünür, mega can orada. Yanında gece lambalı komodin, yatağa çıkan oyuncak bloklar ve yatağa dayalı dev bir boya kalemi; karşıda masa lambası, kalemliği ve kitaplarıyla çalışma masası ve sandalye. Ortada baskılı yarış pistli, rampalı, oyuncak arabalı bir halı; köşelerde oyuncak kale, oyuncak sandığı, pelüş ayı ve bloklardan bir şehir. Kale kapısından yere kıvrılarak giden 22 dev domino, 13 m'lik bir blok kuleye uzanır: ilk dominoyu devir, sonuncusu kuleyi yıkar. Duvarların ve tavanın iç katı (duvar kâğıdı, sıva) kırılır, arkasındaki tuğla kırılmaz. Fişekhane: gece, terk edilmiş bir havai fişek fabrikası; lacivert gökte yıldızlar, ay ve ufukta şehir ışıması, tepelerin ardında ara ara açılan gösteri fişekleri. Ortada 16,5 m'lik tuğla-çelik fişek kulesi: bir buçuk tur saran çelik merdiven, tepesinde deneme atış platformu, havan tüpleri ve KIYAMET küresi. Üç yanda tuğla atölyeler (ahşap çatı, pencereler, içeride tezgâhlar ve sandık rafları), karşılıklı köşelerde iki alçak beton barut deposu (kalın kapı, uyarı levhaları, barut fıçıları); avluda paletlere yığılmış fişek sandıkları, el arabaları, yükleme rampası, su kulesi ve kuleyi çevreleyen kâğıt fener zincirleri. Çatılar çelik geçitlerle kulenin merdivenine bağlanır, üç zıplama pedi kulenin ortasına ve iki atölye çatısına atar. Üç barut fitili kırmızı direklerden depolara koşar; biri bir sundurmanın duvarına tırmanıp çatısından iner. Gök Adaları: gün batımında bulut denizinin üstünde uçan adalar. Ortada gözlemevi ve gözlem kulesi olan ana ada (KIYAMET küresi kulenin tepesinde); çevresinde beş küçük ada: kuzeyde şelalesi bulutlara dökülen göletli bahçe, doğuda yel değirmeni, güneyde köy evi, batıda sütunlu harabe, kuzeydoğuda kristal ocağı. Ana adayı komşularına üç halatlı ahşap köprü ve bir taş kemer bağlar, süzülen bulut taşları basamak olur, adalar arası pedler uçurur. Her ada altından sarkan parlak bir kristalle havada durur: kristali kırarsan ada bulutlara düşer.

License

• Code: PolyForm Noncommercial 1.0.0. You may read, run, learn from, modify and share the code for noncommercial purposes. Commercial use, including re-hosting the game on ad-supported sites or portals, is not permitted. For a commercial license, open an issue or contact the author.
• Name, screenshots and other media (media/, the "FragRush" name): all rights reserved.
• Third-party libraries (three.js, postprocessing, n8ao) keep their own licenses, see THIRD_PARTY_NOTICES.md.
• Versions published before 26 October 2026 were released under the MIT License; that grant still applies to those earlier versions only.

Türkçe: Kod PolyForm Noncommercial 1.0.0 lisanslıdır: ticari olmayan amaçla okunabilir, çalıştırılabilir, değiştirilip paylaşılabilir; reklamlı sitelerde veya portallarda yeniden yayın dahil ticari kullanım yasaktır. Ad, ekran görüntüleri ve diğer medya için tüm hakları saklıdır.