Matching Decompilations — Xbox (Game Decompilations & Reimplementations): open-source projects that exist because someone reverse engineered a closed product, sorted by GitHub stars.
Halo: Combat Evolved (Xbox) decompilation research project
Decompilation of Halo: Combat Evolved (Xbox)
Decompilation of Undertale (Xbox One)
Matching decompilation of Halo 2 for the original Xbox
Matching decompilation of Halo: Reach (Xbox 360, 2010)
Decompilation of Minecraft: Xbox 360 Edition
Matching decompilation of Dance Central 3 (Xbox 360, 2012)
Matching decompilation of Fallout: New Vegas (Xbox 360, 2010)
Decompiled Terraria Xbox 360 Edition source code
Decompiled source of Halo: Combat Evolved Anniversary (Xbox 360)
Decompilation of Xbox 360 Kernel
Decompilation of Banjo-Kazooie (Xbox 360)
Decompilation of Quake 4 (Xbox 360)
Matching decompilation of Sonic the Hedgehog (Xbox 360, 2006)
Decompilation of Rockstar Table Tennis (2006, Xbox 360)
Decompilation of Halo 2 (Xbox)
Engine recovery of Halo 2 (original Xbox) for Linux
Decompilation of Ninja Gaiden Black and Ninja Gaiden 2 (Xbox)
Decompilation and PC port of Project Haggar, the cancelled Halo Mega Bloks game (Xbox 360)
Matching decompilation of Kinect Sports (Xbox 360, 2010)
Decompilation project to rebuild Project Gotham Racing 2 (Xbox)
Decompilation of Rock Band 3 (Xbox 360, retail)
Decompilation of Teen Titans (Xbox)
Decompilation of Street Fighter III: 3rd Strike (original Xbox)
Decompilation of Minecraft: Xbox 360 Edition
Decompilation of Rock Band 3 + TU5 (Xbox 360)
Matching decompilation of Viva Piñata (Xbox 360)
Decompilation of Dance Central 3 (Xbox 360)
Decompilation of Grabbed by the Ghoulies (Xbox)
Decompilation of Jet Set Radio Future (Xbox)
Decompilation of Kinect Adventures (Xbox 360)
Reverse engineering notes for Jet Set Radio Future, companion to the JSRF decompilation
Matching decompilation of Jet Set Radio Future (Xbox, 2002)
Matching decompilation of Saints Row (Xbox 360)
Decompilation of The Simpsons Game (Xbox 360)
Decompilation of the Xbox Live Arcade release of Peggle (Xbox 360)
Decompilation of the original Xbox demo disc launcher