What games have you beaten in a short amount of time.

[Anarchemitis]

I can beat Portal in less than 40 minutes.

 

[WorldCritic]

Finished God of War: Chains of Olympus in one 5 hour sitting.
Mirror's Edge in two sittings, both in the same day.
Mass Effect 1 in two sittings that lasted maybe seven hours together.
Heavenly Sword in one maybe 6 hour sitting.

 

[Smallfry]

Metroid: Zero Mission in 1:30.

 

[NerfedFalcon]

Sonic Colours (Wii) only took me about five or six hours start-to-finish the first time. I didn't get 100%, but I also got about 30 game overs...

 

[DanielBrown]

Bioshock in one sitting. Not sure how long I played though, but I reckon it was an all nighter.
Also finished the God of War and Uncharted games pretty quickly, but they were so amazing that I don't hold it against them.

 

[Alfador_VII]

Portal. Just sat down to try it and then it was over... Same with shit like MW2 and Black Ops.
If I can finish a game in like 4 hours before I go to bed then you made a shit game. (Well taking price into account anyway. If Portal was $15 then fine. If it was like $40 then fuck you Valve!)

I basically counted Portal as free or less. I bought the Orange Box for Episode 2, and TF2. It would have been more than worth it for just those 2.

Then Portal turns out to be the best thing in it, so epic win

 

[Al-Bundy-da-G]

Super Mario World
Took the first star road 45 minutes after I started it was over.