21 hours
Xenogears
PSX
1998

from the second half of disc 1 till well in to disc 2

Wow you guys are quite scary.... at best I have spent 5 hours, maybe on CoD 4 online

lol ya I wasn't gonna post because I only had about 5 or 6 hours for FFXII, and I thought that was alot

I guess I can say 14 Hours, Metal Gear Solid 2.

But am sure I've played Pokemon Sapphire longer in one session b4.....
Same Could go for Pokemon Crystal and Resident Evil 4..... Hmmmm.....

About 6 hours.

I don't like playing too much in one sitting.

Mine is probably around 12-15 hrs.

San Andreas on PS2.

I did not go to sleep that night. I couldn't stop. The only reason I did stop was because I had a dentist appointment in the morning that I went to.

6 hours on Metroid Prime and like 10 or 14 on Ocarina of Time on N64

Actually, 15 hours on Twilight Princess for the 'Cube

i guess the longest time frame i've played was 12-13 hours on Civilization (the first one)

Somewhere around 12 hours.

We started around 8 at night, and ended at 8 in the morning when my mother got up to exercise and go to work.

It was with my one brother and a friend on the Game Cube with like 3 different games. I can't remember exactly as that was at least 4 years ago, but I do know we played like 1 James Bond game, and a fighting game along with one other game.

 Agreed.  I love my games as much as the next guy and have been playing for longer than many on this board have been alive, but some of these numbers aren't impressive...they're pathetic.  Seriously, some of you have a real problem.