Just Getting Started (10 points) - Complete any level in Single player. Rip and Tear (20 points) - Complete any level on 'Nightmare' in Single player. Superior Firepower (25 points) - Complete all levels on 'Ultra-Violence' or higher in Single player. An Important Looking Door (10 points) - Find a secret area of a level in Single player. From Earth To Hell (25 points) - Complete all levels in 'Doom II - Hell on Earth' in Single player. And Back Again (25 points) - Complete all levels in 'Doom II - No Rest for the Living' in Single player. Burning Out of Control (15 points) - Complete any level with 100% kills, items, and secrets in Single player. Destroyer (20 points) - Get 100 frags in Deathmatch on Xbox LIVE. The Great Communicator (10 points) - Get 20 kills using the Chainsaw in a single level in Single player. A Man and a Half (10 points) - Get 20 kills using the Berserk Powerup in a single level in Single player. You Have Huge Guts (20 points) - Kill a CyberDemon using your fists in Single player. A Really Big Gun (10 points) - Find a BFG in Single player.