I started by posting this video of "Doubt" for the Sega Genesis from a MTV Movie Awards sketch.
http://kotaku.com/5302000/the-lonely...the-video-game
I thought it was pretty funny. The joke is that it doesn't translate, but honestly I think the idea of protecting your altar boy is an interesting gameplay mechanic. A variation on protecting another character worked very well in ICO. I love the status bar, too. I wonder if they actually mocked up a level for that and how they did it.
But, that got me thinking, I know I've seen fake video games, with actual gameplay in other movies before. They did a whole wrestling game for The Wrestler, for example. What other ones have you seen and how detailed did they look?