Rage: Bethesda Easter Egg - Go Back in Time to Doom

Go to the Gearhead vault, site of the main mission in subway town. Take out some bosses on the way to the room near the vault. At the bank offices, there are 7 computers that make sounds from Doom when you touch the keyboards. The final keyboard opens a door. Go back to the beginning of the area where you enter the Gearhead vault from subway town. Jump on a fiery barrel and get on the box and open the door. Once inside, you enter a Doom graphics area with retro gameplay. There’s a Doom Marine bobblehead you can click on. You can pick up sniper rounds. Rage and Doom are both made by Id.