I'm a little hesitant about recommending YouDunnit because it's damned confusing and hard to play -- but the idea behind it is very cool, and, well, 48-hour games are rarely going to be perfect.
The basic setup is this: You murdered someone, in locked-room detective story-like fashion, and the detective has shown up to investigate. He's asking everyone their stories. If you catches you out in an inconsistency -- or if you somehow permit everyone else to establish a clear alibi -- you're screwed.
The actual gameplay involves a series of "levels" that are a hour in the past, two hours in the past, three hours in the past, and so on. If you do anything in a level that "violates causality," you are "caught in a lie." Thus, for example, if you give someone a cat in hour -1, and fail to pick up the cat in a previous hour, you lose. You have to keep track of the events that occur, and make sure things remain consistent.
A very clever concept.
Something similar
"The Incomparable Deductions of Police Constable Sir Nicholas Spratt — The Early Years", Win and OS X versions available:
http://www.vectorstorm.org/get-games/game-in-a-week/nicholas-spratt-the-...
Not a 48 hour design, but still hard and confusing to play...
Incomparable Deductions
Yep... We reviewed it.
We understand that this game
We understand that this game can be confusing as fuck, and we can assure you that it was a bit brain-breaking at times to dev too. We thank you for playing it, and if you manage to get through the story (win or lose) we hope you have a good dose of fun and enjoy the creative experiment we've offered. forex broker