Team Fortress 2
Valve’s class-based shooter, Team Fortress 2, has achieved legendary status thanks to its varied game modes, impeccable sense of fun, and being home to more hats than the world’s millinery stores combined. The whole game is free-to-play these days, from the standard shoot-everything-that-moves deathmatches to the fantastic Mann vs. Machine co-op mode where teams fend off waves of robots. Not to mention it’s constantly being cared for with regular seasonal updates.
