The Unto the Evil Title update for DOOM has 5 achievements worth 100 gamerscore.
Use a taunt from Expansion 1 during a Multiplayer Match
Play a Multiplayer Match with a piece of Robotic Armor equipped
Kill 10 enemies with the Harvester demon in Multiplayer
Kill 10 enemies with the EMG Mark V Pistol in Multiplayer
Kill 5 enemies with the Kinetic Mine in Multiplayer