In Red Faction: Guerrilla, the player takes the role of a guerrilla member, Alec Mason, as he assists the Red Faction to disrupt and overthrow the power of the Earth Defense Force (EDF) on Mars. This is presented to the player in a third person perspective, a departure from the series’ previous two games which were first person shooters, a change that Volition claims to help the player see and appreciate the surroundings as they are destroyed. Much of the game centers around the game’s Geomod 2.0 engine, which allows for buildings and other structures to take damage, fall apart and collapse. In many cases, destroying buildings will leave behind salvage, the game’s form of currency, which can be used along with salvage rewarded by completing missions to unlock new weapons and upgrade existing ones when visiting one of the Red Faction safehouses.