Red Faction: Guerrilla is the third game in the Red Faction series, and takes place fifty years after the original game. It was developed by Volition, and published by THQ.
Set fifty years after the first game, Mars is now being colonized, but is under the strict rules of the Earth Defense Force. Alec Mason arrived on Mars as a miner, but on his his first day there his brother is killed by the E.D.F. causing Alec to join the resistance group called the Red Faction.