Red Faction: Armageddon has a new DLC pack that just got released, which is pretty ironic timing considering the franchise has been totally canned by THQ. Red Faction: Armageddon – Path to War includes four new single players missions all about the destruction of the Mars terraformer (which happens at the beginning of Red Faction: A), and has two new news, ten new achievements, and at least one new vehicle – the Red Faction armored surface tank. If you've got the game on Steam, you can grab this DLC pack here.
Red Faction: Armageddon Has New Single Player DLC
Path to War is a prequel mission pack of sorts, giving more detail to the opening story plot of Red Faction: Armageddon.