Fortress Forever

Fortress Forever is a free multiplayer first-person shooter which aims to bring the fast-paced gameplay of the earliest games in the Team Fortress series (QuakeWorld Team Fortress and Team Fortress Classic) into the technology of Valve's Source engine. Unlike Valve's official sequel, Team Fortress 2, which revamped the artstyle and simplified the gameplay of the series by removing bunnyhopping and grenades, Fortress Forever sticks closely to the artstyle and gameplay of the original games. Fortress Forever was first released as a modification for Half-Life 2 on September 13, 2007 before becoming a standalone game on Steam on March 27, 2015.

The official game modes feature two or more color-coded teams competing against each other to achieve objectives. Game modes include Capture the Flag, where the first team to steal the opposing team's flag and bring it back to their base a certain number of times wins; Territorial Control, where teams must capture and hold areas of the level; and Payload, where one team must escort a player-controlled "Civilian" class to a safe zone while protecting them from the opposing team. There are nine playable classes to choose from by default, each with a unique selection of weapons and abilities/statistics, with a tenth class, Civilian, only being playable in Payload.