GTA III and Vice City fully reverse engineered: re3
My favorite game.<p>GTA III, Vice City and San Andreas had mod allowing to play online (multiplayer) called "Multi Theft Auto" (for Vice City there was another one called VC:MP)<p>As far as I remember, the MTA project was started by a guy who initially tried to build a trainer by reverse engineering one of the GTA games, in the end he ended with a multiplayer mod. Fun times.