D2R Mobile

An open-source compatibility layer for Diablo II: Resurrected with the Reign of the Warlock expansion, for iOS, macOS, Android and HarmonyOS. It brings the Nintendo Switch release you bought, expansion included, to iPhone, iPad and Mac in full: the original game code runs natively, every control is rebuilt for touch, the frame rate holds at 60 fps, and you are in a game one second after the main menu. There is now a native macOS version as well (first version): on an Apple silicon Mac it starts on double-click and works with keyboard, mouse and gamepad. Since v2.0 there is an Android version (community port): the same game program executes natively on ARM64 Android phones, with the graphics reimplemented on Vulkan; on a Snapdragon 8+ Gen 1 phone the camp and the Den of Evil and Cow Level fights all run at a median 60 fps (see "Android" below); a HarmonyOS version runs on the same engine (community port: an unsigned shell from the Releases page that you re-sign yourself, nothing to build; see "HarmonyOS"). Apple TV 4K (3rd generation, A15) has a community port (developer preview) that has reached the character-selection screen only on its author's device; see the device table below.

This is not a tech demo that "sort of runs". It is a mobile version polished for daily play, from your first character all the way through the endgame.

Platforms: iPhone / iPad (iOS 26 and later; iOS 18 – 25 with the older-API build) · Mac (Apple silicon, macOS 26 or later; macOS 15 – 25 with the older-API build) · Apple TV 4K (3rd generation, A15; community port, developer preview) · Android phones (ARM64, Android 12 or later, Vulkan 1.1; community port) · HarmonyOS phones (HarmonyOS NEXT; community port, unsigned shell from the Releases page that you re-sign yourself) · Game version: Switch release with Reign of the Warlock, 1.0.34.0 (corresponds to PC version 3.3.94012) · English / 中文 / Español / Русский / 한국어 · License: MIT · Bring your own game files

中文: README.zh-CN.md · Español: README.es.md

100%	60 fps	about 1 s	about 3.8 W
The original gameplay, because it is the original program	Steady, with no drops once the device warms up	From the main menu into a game	Whole-device power draw at 60 fps

What it is, and what it is not

It is:

• The game's own aarch64 program, executing directly on the device, with no emulated CPU. iPhone and Switch use the same class of processor; only the handful of instructions that cannot run unchanged under Apple's kernel are rewritten, and every other byte of the program is left exactly as shipped. Every class, every Runeword, Terror Zones, bosses, drop rules and quest flow are identical to the original.
• The platform services the game expects — system calls, the file system, the graphics API, audio, input — provided by a small host written for Apple platforms. The graphics API is reimplemented entirely — on Metal on Apple devices, on Vulkan on Android — with no emulation layer in between, and the shaders are translated offline from the game's originals.
• A port built for phones, and taken all the way: a complete touch control scheme, edge-to-edge iPhone and true full-screen iPad display, controller support, a power saver mode, save sync, six languages (English, Chinese, Spanish, Russian, Korean and Portuguese), and a whole set of endgame modes and quality-of-life features the original never had.

It is not:

• An emulator, cloud gaming, or streaming.
• A source of game content. It contains none and distributes none. There is no game program, art, text, data table or shader in this repository; all of that is generated on your own machine from your own files (see docs/GAME_FILES.md). What the repository does carry is the interface information we recorded to make the port work — shader interface descriptions, the graphics API function table, addresses inside the program and the like — listed item by item in docs/DERIVED.md.
• Online. There is no multiplayer; the game runs fully offline and needs no online account.

Battle-tested

All 44 iPhones and iPads in the closed beta — 35 devices registered for direct install (25 iPhones and 10 iPads), plus 9 TestFlight accounts with one device each — completed Normal, Nightmare and Hell with multiple characters, and the experience was excellent. From an iPhone 14 Pro Max with 6 GB of memory to the latest iPad Pro, not one device fell behind.

	Models
iPhone	14 Pro Max, 15, 15 Pro, 15 Pro Max, 16 Plus, 16 Pro, 16 Pro Max, 17 Pro Max and more
iPad	iPad Air, iPad mini, iPad Pro 11-inch and 12.9 / 13-inch (including M2 and M4) and more
Lowest model tested	iPhone 14 Pro Max (A16, 6 GB): a flawless 60 fps

iPhone and iPad share a single install package.

Fast, smooth, and easy on the battery

Measured on a real device (iPhone 17 Pro Max):

Item	Reading
In-game frame rate	60 fps, steady, with no drops once the device warms up
App launch	0.15 s
To the main menu	about 1 s
From the main menu into a game	about 1 s
Quick Restart, back in a game	about 1.2 s
Longest frame when changing acts	about 0.1 s
Whole-device power, 60 fps	about 3.8 W (in camp, 50% brightness): nearly 5 hours of continuous play on a full charge
Whole-device power, power saver mode at 30 fps	about 1.85 W, about half the 60 fps figure, for about twice the battery life

Measurement conditions: power is whole-device power measured on 2026-10-10 on an iPhone 17 Pro Max, standing in the Act I camp at 50% brightness, with 60 fps and power saver mode measured in the same scene; battery life is calculated from the measured power and the battery capacity, not by playing from full to empty. Launch and game-entry times were measured on the same model in 2026-10; frame rate and act-change readings were taken on the same model on 2026-10-12 while moving through areas and changing acts after entering a game.

The install package is only a little over 100 MB. The game resources (about 5.6 GB) are placed on the phone separately, and updating the app touches neither your saves nor the resources.

This is the beginning of the README. Read the rest at the original. Read the full README ↗