Fortress Forever is a multiplayer first-person shooter modification of Half-Life 2.

[2][3] Fortress Forever was originally released as a modification for Half-Life 2 on September 13, 2007.

On March 27, 2015, Fortress Forever was released on Steam.

[8] In January 2024, development was started on a project to update Fortress Forever to the 2013 branch of the Source Engine.

[9] The project was made available as a beta branch on Steam and later formally announced on October 12th, 2024.