Found by long-term MeFite Going To Maine, DOOM: The Gallery Experience is a DOOM mod that changes out all of its various elements for museum equivalents. Ammo becomes drinks from among Wine, Beer, Gin or “Watr”; Health has become Cash (which you can spend in the gift shop) and Armor becomes Cheese. (You still pick them up like powerups, though.) And there’s still secret passages to find. The map is generally the same as that as the first level from the shareware game, although the demons have been moved out and replaced with objets d’art, all of which can be examined for information on the work.
You can either play it yourself on Newgrounds, or get the general idea from this Youtube video (4 1/2 minutes):
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