[Updated] Playable Doom (and Quake!) Levels Hidden In id's Rage

[Update]

Thanks to GI readers Garrett, Jake Hofmann, and Tyler, we now know that id's other major franchise, Quake, is also seen in a Rage Easter egg

[Original Story]

Yesterday, it was revealed that there was a small Wolfenstein Easter egg in id Software's latest shooter Rage. Now, it appears that another -- even more iconic -- classic id franchise is also represented in classic form in Rage.

There's actually a playable level of Doom in Rage; the video posted below shows you how to unlock it (via a series of computer terminals in the game). You can also collect a Doom marine bobblehead while you're there. Anyway, it's a neat little extra to an already epic title.

Via: Kotaku