If you could only play ONE game for the rest of your life, what would it be?

portal 2!

Smash bros maybe.

Super Mario Bros, I've already played it for hundreds of hours.

kf, you can never kill enuff zeds gavna

One of the Saints Row games. If not, then maybe Garry's Mod or Don't Starve.

An HD remake of FF VIII, possibly with achievement and/or high score system :)

Bad Rats.

Probably some MMO since there's always something new being added.

Dota 2 !

Warcraft 3, the map diversity is too good

I can't say for sure, my opinion changes constantly.

Marvel Vs Capcom 2 is a strong contender.

Odin Sphere maybe.

Eschatos I don't think would ever get unfun.

Fallout: New Vegas + the DLC with maybe some mods and stuff

GTA IV.

cs 1.6

Skyrim

GGGGGGGGGGGGTTTTTTTTTTTTTTTTTTTTTTAAAAAAAAAAAAAAAAAAAA VVVVVVVVVVVVVVVVVVVVVVVV

Dota 2 :D

Team Fortress 2 - This is the best FPS ever.

Gemcraft Labyrinth :v

DotA 2

Euro Truck Simulator 2.

Dr. Mario. I would need something that has no clear beginning or end.

Either way, I think it's safe to say that after six or seven months, I probably wouldn't play video games ever again.

TES IV: oblivion. it and ME1 were the first games I bought along with the xbox 360 and I spent ~50hrs on ME1 which is nothing comparing to almost 150 hours on Oblivion.