Harry Potter and the Chamber of Secrets (Xbox Recomp)

Harry Potter and the Chamber of Secrets NTSC-U — Xbox PC port

A native Windows port of the original Xbox game Harry Potter and the Chamber of Secrets (2002), 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:

• Picture: resolutions up to 4K with MSAA/SMAA and anisotropic filtering, and true 16:9 (widened 3D, with 2D and cutscene shots kept in shape).
• Display: windowed, borderless or fullscreen.
• Sound: 5.1 surround output.
• Controls: keyboard and mouse with rebinding and a movement pace on the mouse wheel; controller remapping, deadzones and vibration strength.
• Accessibility: colour-blind correction filters.
• Smooth play: shaders prepared ahead.

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 latest release, put your disc's files or the .xiso in a game folder beside the executables and start hpcos_launcher.exe. Requirements, controls and every option are in port/README.txt; what changed in each release is in port/CHANGES.md.

Building

See port/DEVELOPING.md: setup, regenerating the code from the XBE, building and making a release.

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/.
• The Direct3D 12 renderer by TGP482 and Joshhhuaaa — the D3D8-to-Direct3D 12 renderer the port's graphics are based on, MIT (port/src/renderer/LICENSE, port/NOTICE).
• 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
• 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.