Complete any level of DOOM in single player

Gather intel on Raul Menendez from Mullah Rahmaan.

Complete 1 challenge in any level.

Earn 1 star in Special Ops Mission Mode.

Kill Zeus

Completely upgrade all weapons

Acquire the Boreas Icestorm

Kill Cronos

Gut 3 Centaur Generals

Kill the Poseidon Princess

Kill Hermes and acquire his Boots

Cover Kratos in 500 buckets of blood by killing the enemies

Kill Hades