Originally Posted by NitroxAZ
Have you guys got up out of the chair you are strapped into at the menu screen? If not, repeatedly press L2 R2 on PS3 or LT RT on XBOX and you will break out of the restraints. Walk around to the computer behind the chair you were in and press the corresponding button that the screen prompts. Enter the word ZORK and you can play the 80's word based action game and get the "Eaten by a Grue" achievement.
The better one IMHO is to exit that and enter the letters DOA, you will be able to play an old school style top down shooter called Dead Ops Arcade and get the "Insert Coin" achievement. There are a few other achievements you get while playing this one as you go.
There are others unlocks if anyone is interested.
Hell Yes I'm interested, More Unlocks Please