The Hell Followed Title update for DOOM has 5 achievements worth 100 gamerscore.
Detect 20 enemies using the Threat Pulse in Multiplayer
Kill 10 enemies with the Cacodemon in Multiplayer
Kill 10 enemies with the Reaper in Multiplayer
Play a Multiplayer Match with a piece of Cyber-Demonic armor equipped
Use a taunt from the "Hell Followed" DLC during a Multiplayer Match