Final Fantasy XI

[!IMPORTANT]

▶ To play, get the XI on Anything launcher

The launcher installs and updates everything for you. You don't need to build this repo to play. Paste into Terminal:

curl -fsSL https://raw.githubusercontent.com/rubymatrix/xi-on-anything/main/install.sh | bash

Needs an Apple silicon Mac (M1 or later), a Steam Deck or an x86_64 Linux PC, and your own copy of FINAL FANTASY XI. Other platforms: see Platforms. This repo is the source of the recompiler and game host, for anyone who wants to build it.

FINAL FANTASY XI running natively, with no Wine, Rosetta or Proton. The game's FFXiMain.dll (and FFXi.dll) are statically recompiled from 32-bit x86 to C on your own machine, from your own install, and run on a platform layer of our own: Win32, Direct3D 8 on Metal, Vulkan, Direct3D 12 or WebGPU, audio, input and sockets. This repo holds the recompiler, its runtime, that platform layer, and host64, the game host, with its own sign-in screen drawn in the game's UI art.

Works with LandSandBoat servers. Sign in with a username, password and one-time code, or a server launcher's token; pick the server in the sign-in screen's Settings.

Platforms

[!TIP] Find your platform, then follow its guide. Each one goes from nothing to the title screen.

platform	status	how you get it	guide
macOS, Apple silicon	✅ Supported	Launcher (the line above), or build from source	macOS
Steam Deck	✅ Supported	Launcher (the line above, in Desktop Mode), played from Game Mode	Steam Deck
Linux, x86_64	✅ Supported	Launcher (the line above), or build from source	Linux
iPhone / iPad	✅ Supported	Build on a Mac, install with a free Apple account	iPhone and iPad
Windows, x64	✅ Supported	Build from source (Visual Studio or llvm-mingw)	Windows
Web browser	🧪 Experimental, self-hosted only	Build and host it yourself	Web browser
Xbox One / Series	🧪 Experimental	Developer Mode, sideloaded	Xbox
Android, ARM64	🧪 Experimental (tested on a Pixel Fold)	Debug APK	Android
PS4	🧪 Experimental	Jailbroken console, fake PKG (branch port/ps4)	PS4

Every platform needs your own copy of the game (a FINAL FANTASY XI folder of a supported build, with FFXiMain.dll and ROM in it) and a LandSandBoat server to sign in to. What every platform has in common is in docs/platforms.

What's better than the original

• A Modern page in the game's own Config menu, next to Gameplay, Windows and the rest:
  • ambient occlusion, fog, god rays, bloom, color grading and sun shadows, each with a slider
  • per-pixel lighting (off, sun only, all lights), sharpening and anti-shimmer
  • texture filtering up to 16x, and longer draw and character distances
  • 30 or 60 fps
  • interface shape: full width, 16:9 or 4:3
  • the occlusion check: off (everything counts as seen, the fastest) or exact
• Widescreen and ultrawide: the 3D view widens with the window instead of stretching a 4:3 view, the interface can stay 16:9 in the middle of an ultrawide, and nameplates keep their shape.
• A native sign-in screen in the game's own window themes and font, with the password kept in the system's password store (macOS Keychain, Windows Credential Manager, Linux Secret Service).
• DAT overlays for a server's own DATs, without touching the install.
• Ashita v4 and Windower 4 Lua addons, unmodified, without DLL injection (in progress).
• Discord Rich Presence: your character, jobs and zone on your Discord profile while you play, straight to the Discord app's local socket (no SDK, nothing to install).

Screenshots

Documentation

Platform guides	Step by step, for every platform
Installing	The launcher (macOS, Steam Deck, Linux) and the one-line source install
Building	Building by hand on macOS, Linux and Windows; Final Fantasy XI.app and its signing
Running host64	The sign-in screen, command-line options, DAT overlays, environment variables
Options catalog	Every setting, in game and out
Addons	Ashita and Windower Lua addons
Client versions	The supported builds, and adding a new one
iPhone and iPad notes, Web, Xbox, Android	Each port's developer notes
Replay scenes	Recorded scenes for performance tests
Repository layout	What lives where

Rules

• No Square Enix bytes in this repo, ever. No retail DLLs, no unpacked images, no DAT files, and no generated C. Generated code is derived from the game, so it is produced on the player's own machine from their own install. .gitignore enforces the obvious paths; the rule applies everywhere.
• What is committed: the recompiler, the runtime, the platform layer, tests, and per-build metadata: addresses and shapes only (function ranges, switch tables, tail jumps), keyed by the SHA-256 of the retail DLL. The supported builds are listed in Client versions.
• LandSandBoat packet captures are committed too, as the maintainers agreed: the replay suite's recordings in tools/replay/scenes/, so every machine and CI plays the same scenes. They are what a server sent, not game files.

License

MIT (LICENSE), for this repo's own code. third_party/ keeps its own licenses (stb: MIT or public domain; SDL3: zlib; Mbed TLS: Apache-2.0). The license does not cover FINAL FANTASY XI: no game files or code derived from them are in this repo, and what the tools produce from your install (generated/, build/) is derived from Square Enix's work, for your own use only.