After the Halo event of 2552, there is a brief but violent period of civil war among the humans. Two armies on opposite sides of a canyon, the Reds and Blues, fight in the most worthless piece of real estate in the galaxy.

In the near future, ten soldiers battle for control of the most worthless spot in the galaxy - a box canyon in the middle of nowhere. Red Vs Blue documents the story of these two armies as they wage a war they really don't understand - or want to fight in the first place.—Chris

Season 3: At the end of season 2, Doc is possessed by the AI known as O' Malley, which formally resided in both Tex (season 1) and Caboose (season 2). Realizing that O' Malley could destroy them, the Reds and the Blues decide to team up in an attempt to destroy him. However, when they tamper with the teleporters, they end up in different places, leaving people alone with their once sworn enemies. Red vs. Blue Season 3 is even funnier than ever as new maps are introduced to the story line, and don't forget about the twist ending.—Edge0914

Season 2: When a mild-mannered medical officer finds himself deployed to the most worthless stretch of land in the entire galaxy, the last things he expects to find are his first patients dead, a poltergeist haunting a robot, a 200-ton tank in the center of a love triangle, and an evil strain of artificial intelligence attempting to enslave all of humanity. Welcome to Blood Gulch.—SM

Season 4. The Great Destroyer has arrived. The blues confront the Great destroyer who informs them that Tucker must go on a quest. Meanwhile the Reds return to Blood Gulch where Sarge questions Simmons' sanity after Simmons sees a familiar tank.—johncena.fw