The Binding of Isaac: Repentance+, playable in a browser tab.
This is the real Repentance+ game code, recompiled from the Windows executable
to WebAssembly. It's not a remake and not an emulator, so every item, synergy
and bug works the way it does on PC.
It runs on desktop and on phones, keeps your saves in the browser, and can
install mods from the game's own MODS menu.
On a phone
There are no extra buttons on screen; you play by touching the game.
| |
|---|
| Move, shoot | Left thumb, right thumb |
| Active item, card or pill, bomb | Tap it in the bar under the room |
| Swap items | Tap the small second item |
| Drop a card or trinket | Hold it |
| Map | Tap the minimap, or hold it to peek |
| Pause | The paper icon next to the map |
| Menus | Tap a row to pick it, tap it again to choose it; swipe to scroll |
| Back | The BACK note in the corner, or two fingers |
| Cutscenes | Tap to skip |
Held upright, a pad under the picture also moves through the menus; tap it to
choose. Switching to another tab pauses the run.
Vibration follows the game's Rumble option.
On a keyboard
| Key | |
|---|
| W A S D | Move |
| ← ↑ → ↓ | Shoot |
| Space | Active item |
| Q | Card or pill |
| E | Bomb |
| Ctrl | Swap, hold to drop |
| Tab | Map |
| Esc | Pause |
| F | Fullscreen |
On a controller
Plug in a controller (USB or Bluetooth), press any button so the browser sees it,
and start the run with it: the game gives player one to whichever device starts
the run. Buttons are the Xbox layout, sticks are analog, and rumble follows the
game's Rumble option. On the MODS screen, X opens the mod browser.
Mods
Mods from the Steam Workshop run here too, Lua and all. Open the game's
MODS screen and click MOD BROWSER (press B, or tap it on a
phone): search the catalogue, read what each mod does, and install it. The game
restarts with the mod loaded. A mod you already have can be added from a
.zip.
Saves
Saves stay in the browser you play in. EDIT FILE on the file select screen
exports a save or imports one, including a .dat save from PC. Deleting a file
asks first.
Browsers
Chrome, Edge and other Chromium browsers, on desktop or Android. If your browser
can't run it, the page says so.
Building it yourself
You need your own copy of the game; this repository has no game files in it.
docs/DEVELOPING.md covers the build.
Star history
Credits
- Ported by chiikabu.
- The Binding of Isaac: Repentance+ is by Edmund McMillen and Nicalis.
- The loading screen dance is the Specialist dance by dazlex.
- Function signatures from REPENTOGON.
The Binding of Isaac belongs to Nicalis, Inc. and Edmund McMillen. This is a fan
project, not affiliated with or endorsed by them.
License
Copyright (C) 2026 chiikabu. This project's code is free software under the
GNU General Public License v3.0 or later.
The license covers this project's own work only. It gives no rights to The Binding of
Isaac: Repentance+: the game's code, assets and name belong to Nicalis, Inc. and
Edmund McMillen, and so does anything recompiled or translated from its executable.
REPENTOGON, included as a submodule,
keeps its own license (GPL-2.0).
