Team Fortress 2
This team-based multiplayer first person shooter from Valve has been out for almost a decade but remains to date one of the most addicting and fun shooters, to date. Players can pick from several character classes to support their teammates with in a variety of game modes, including Team Deathmatch, Capture the Flag, and Payload—a game mode where both teams must escort a mine cart filled with explosives to an objective point. Players can earn all manner of weapons and vanity items just by playing the game for free.
