Complete any level in Single player
Complete any level on 'Nightmare' in Single player
Complete all levels on 'Ultra-Violence' or higher in Single player
Find a secret area of a level in Single player
Complete all levels in 'DOOM II: Hell on Earth' in Single player
Complete all levels in 'DOOM II: No Rest for the Living' in Single player
Complete any level with 100% kills, items, and secrets in Single player
Get 100 frags in Deathmatch on Xbox LIVE
Get 20 kills using the Chainsaw in a single level in Single player
Get 20 kills using the Berserk Powerup in a single level in Single player
Kill a CyberDemon using your fists in Single player
Find a BFG in Single player
