Team Fortress 2
As some of you might know I love Team Fortress 2 however, many of you may not know what this game is. Team Fortress 2 is a completely free online FPS that can be downloaded online via steam. You start by clicking on multiplayer where it will choose a server for you and send's you into the map. You then choose one of the nine classes (sniper being my personal favorite) and enter the map. The game has a drop system that will reward you for every hour of time played with a random weapon with certain buffs such as infinite ammo.