Doom Cheats on Xbox 360

Get to secret level

In level 3 shoot all of the barrels and a bridge will appear over the pit of acid you see when you first open the door. Go in and kill all the enemies. Then go to the hidden exit in the room activate it and you will be in the secret level.

Achievements

Unlockable - How to Unlock

CLEAN SLATE - Kill all monsters in level on 'Hurt Me Plenty' or higher.
DESTROYER - Get 100 kills on Xbox Live.
EPISODE FOUR - Complete Episode 4 on 'Hurt Me Plenty' or higher.
EPISODE ONE - Complete Episode 1 on 'Hurt Me Plenty' or higher.
EPISODE THREE - Complete Episode 3 on 'Hurt Me Plenty' or higher.
EPISODE TWO - Complete Episode 2 on 'Hurt Me Plenty' or higher.
HOARDER - Find all items in level.
NEOPHYTE - Complete any level.
NIGHTMARE - Win a Nightmare level in single player.
RAMPAGE - Complete all levels on UltraViolent mode.
ROOKIE - Get 50 kills on Xbox Live.
SCOUT - Find a secret area of a map.

Secret Gamerpic

Successfully complete any level under the Nightmare difficulty setting to unlock a Gamerpic of a demon.

Secret Gamer Pic

Get a 100% kill rating on any level with a "Hurt Me Plenty" or higher difficulty level to unlock a Gamer Pic of a Doom Marine.