Gang Garrison 2 is a free multiplayer 'demake' of Valve's Team Fortress 2. With all 9 classes, many different TF2-inspired environments, and fast-paced, team-based, multiplayer gameplay, GG2 is the premier TF2 tribute.
It was originally conceived by mrfredman and MedO for the 2008 TIGSource.com 'Bootleg Demakes' competition, but is now open source (MPLv2), and many developers have since added new features. If you want to help us improve the game, you can find more information here.