If you remember the Wolfenstein 3D room contained an amulet from the original game that you could collect. In the Doom room, you'll find a 'Space Marine bobblehead' figure. The inclusion of things like this in games are genius ideas. What better way to introduce your companies games to the folks who are to young to remember those old schoold PC game, but are now getting into these more mature games made by older developers. It's almost like finding a timeline of subject matter within the game. Kudos id Software!
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