Trouble In Terrorist Town -- or TTT -- is a gamemode on Garry's Mod similar to Among Us, where you play as members of a terrorist group infested with a small band of traitors. The "Innocent" terrorists have to work together to identify and eliminate the Traitor terrorists, before they get offed themselves.
Having Counter-Strike: Source mounted is highly recommended to ensure most textures and models for custom maps are present.
If you do not own the game, you can download and install the game content as an addon from here, instead.
