In light of the remakes thread ...
The Independent Gaming Source is currently running a "demakes" competition. Basically, the goal is to produce a old-generation remake of a modern-generation professional game. For instance:
http://www.spacerecordings.co.uk/silent20.png
Soundless Mountain II, a demake of Silent Hill 2
http://img354.imageshack.us/img354/2255/picture8wn4.png
or Super 3D Portals 6, an atari-style demake of Portal.
http://www.ivansafrin.com/crap5/rupture3.png
Rupture, a demake of Bioshock
http://www.dawnofdaria.com/Kinten/Fillauth/screen.jpg
Fillauth, a demake of Fallout III.
The list goes on! Anyway, firstly, what is your opinion on this type of thing? Would you play a retro-nized version of a new game? Secondly, if you were to create one, which game would you choose?