Played wow for 2 years, quit after expansion, I totalized 400 days with my main and alts.

http://img206.imageshack.us/img206/7641/bankaes8.jpg

http://img440.imageshack.us/my.php?image=emilyspearmethodofsylvawv8.jpg

Due to online multiplayer and having played many hundreds of matches, i would say Virtua tennis 3 (360)..... played for about 3 hours a night most nights for about 4 months....... i'd say i racked up about 500 hours on Virtua tennis 3....... longest one session of gaming has to be when i was going for the 7 day survivor achievement on dead rising..... about 15 to 16 hours non stop (occasional pause for food and loo breaks of course lol)

Melee and Sonic 3 & Knuckles don't save time so I don't know how long.

Well, I played Tetris on Gameboy for years (still do) so likely over 500 hours. Other than that, Civilization 2 has got to be in the hundreds of hours.

I'm not sure what all that means in the pictures because I've never played the game but I'm sure it's impressive

world of warcraft.

60 days on one character....1440 hours.

Well, it might sound idiotic, but i spent more than 150 hrs on "The Longest Yard", a deathmatch map for QuakeIIIArena, playing against AI Bots. At that time, you could've woke me up from a deep sleep, and id still beat the Bots at nightmare difficulty 20 frags to 5 ,or better.

Either Football Manager 2005 or 2006, I played with both in one savegame more than 11 seasons, I remember (don't know which of them) saying I had played for more than 6 days, that should be more than 144 hours.

Pro Evolution Soccer 4/5/6 also, having played more than 10 seasons of the Master League, 10 minutes per game, around 45 games per season, should amount more than 600 hours for each one.

U can use a command  /played to view the ur play time with that char, in the screen shot it dispayed 305 days. At the end of my wow carrier, it was at 380 days on my main char.

Over 1000 hours of melee, and Im halfway there in brawl (500 hours). Also I think I clocked a lot more time than that playing WoW, probably over 3000 hours I dont know, but a lot.