Maybe this isn't a revelation to everybody, but it just hit me the other day: Big Trouble In Little China is an old-school dungeon crawl.
You've got a couple of fighting types, a magic-user, and a bunch of nameless cannon fodder making repeated trips into a bizarre subterranean complex with the eventual goal of saving the girl(s) and slaying an evil wizard. Don't even get me started on the beholder-thingy, the "black blood of the earth", and the big centipede-creature that pops out and instantly wastes a bunch of the henchmen. I could go on and on - it's all there.
Even the attitudes of the characters, especially Jack Burton, are pretty gamer-ish:
"Hollow? Fuck it."
(I still have an overwhelming desire to play an Egg Shen-style adventuring alchemist.)
I doubt there are many people following this blog who haven't already seen the movie, but if you haven't, you owe it to yourself to check it out. And if you have seen it, try giving it another viewing through the lens of the dungeon crawl.