The Demons of the Badlands Add-on for Red Faction: Guerrilla has 10 achievements worth 250 gamerscore.
Destroy all Medium and High Priority Targets in Mariner Valley.
Collect 75 Marauder Power Cells.
Complete Redemption.
Complete Retribution.
Complete Rescue.
Destroy 100 EDF vehicles.
Break the EDF Control of the Mariner Valley.
Destroy the 4 Marauder War Totems.
Complete Marauder Actions.
Beat all Pro times in Mariner Valley Demo Masters and Transporters.