Harry Potter and the Philosopher's Stone (Xbox Recomp)

Harry Potter and the Philosopher's Stone (PAL) — Xbox to PC port

A native Windows port of the original Xbox game Harry Potter and the Philosopher's Stone (2003), made by static recompilation: the game's x86 code is translated to C and compiled for Windows, with the Xbox kernel, Direct3D 8, DirectSound and input replaced by native code. No emulator.

Features beyond the original: resolutions up to 4K with MSAA/SMAA and anisotropic filtering, true 16:9 (widened 3D, 2D kept in shape), windowed/borderless/fullscreen, keyboard and mouse with rebinding, controller remapping, deadzones and vibration strength, colour-blind correction filters, a 30 fps cap or unlocked frame rate, and "Quit To Desktop" in the game's menus.

This repository contains no game content. To play or build it you need the files from your own copy of the Xbox disc. The build regenerates the recompiled code from your default.xbe.

Playing

Download the repository, build the executables and put your disc's files or the .xiso in a game folder beside the executables and start hpps_launcher.exe. Requirements, controls and every option are in port/README.txt.

Building

See port/DEVELOPING.md: MSYS2 (UCRT64) setup, regenerating the code from the XBE, building, debugging tools and how the port works.

Credits and licences

The port's own code is MIT licensed, © 2026 MiddleDucky (LICENSE). The parts below keep their own licences and copyright.

• xboxrecomp — the static recompilation toolkit this port is built on (runtime, kernel layer, pipeline), MIT, by sp00nz. Its own readme: README.xboxrecomp.md; licence LICENSES/xboxrecomp-MIT.txt; third-party parts (including LGPL code from xemu) in NOTICE and LICENSES/.
• SCDA-XBERecomp by TGP482 — the D3D8-to-Direct3D 12 renderer the port's graphics are based on, MIT (port/src/scda/LICENSE.SCDA).
• Dear ImGui (MIT, port/third_party/imgui) and SMAA (MIT, Jorge Jimenez et al.).

Thanks

These projects were references for hardware behaviour, XDK details or fixes (no code taken unless listed above):

• xemu — Xbox hardware behaviour; the APU code listed in NOTICE
• XbSymbolDatabase — XDK function addresses
• Cxbx-Reloaded and xboxdevwiki — kernel and hardware reference
• Nightfire Windows Port — the same lifter bugs, found first
• DefJamFFNY-recomp — single-core guest thread pinning
• Unicorn Engine — the debug-only difftest build

Harry Potter and all related names and artwork are trademarks of and © Warner Bros. Entertainment Inc. The game is © Electronic Arts. This is an unofficial fan project, not affiliated with or endorsed by Warner Bros., Electronic Arts or Microsoft.