Team Fortress 2 is a free-to-play team-based first-person shooter (FPS) multiplayer video game developed by Valve Corporation. A sequel to the original mod Team Fortress based on the Source engine, it was first released as part of the video game compilation The Orange Box on October 10, 2007 for Windows and the Xbox 360. A PlayStation 3 version then followed on November 22, 2007. The game was later released as a standalone package for Windows on April 9, 2008, and for Mac OS X two years later.
Contributions by Tom Edwards, Olivier Beaton, and Pkaulf.