• Killzone 2 - like 350 hours. Was an addict basically but I'm off it and have no time for it now.
• Elder Scrolls - like 200 hours. Epic game.
• GT5P - like 100 hours.
• Metal Gear Online - like 100 hours
• COD4 - like 100 hours.

You?

Oblivion - probably around 100 hours (Bought twice for PC and 360)
Fallout 3 - Probably around 150 hours (bought it twice for PC and for I think it was 360..)
FFXI - Like 70 days (real days)
WoW - Probably 100 or so days - I kicked my habit, not paying just to see how many days I have
COD:MW2 - Not sure, assume probably 100 hours or so

Age of Empires 2 - 1000Plus Hours

Oblivion - 300Plus Hours

Fallout3 - 200Plus Hours

Diablo 2 - 200Plus Hours

Animal Crossing - 200Plus Hours

Super Smash bros Melee - 200Plus Hours

MW2 - 100Plus Hours

Morrowind - 100Plus

Zelda OOT - 100Plus Hours

Zelda Majora's Mask - 100Plus Hours

FF7 - 100Plus Hours

WoW -100Plus Hours

FF12 - 100Plus Hours

Pokemon Heart Gold 100Plus Hours

Pokemon Gold 100Plus Hours

Pokemon Red 80Plus Hours

MGS4/Online - 80Plus Hours

Dragon Quest8 - 40Plus Hours

Demons Souls (80Plus Hours) (got no where and still loved it!)

Red Dead Redemption - 40Plus Hours.

Pokemon Blue - 400 hours

Pokemon Gold - 300 hours

Pokemon Crystal - 300 hours

SSBMelee - 350 hours

Pokemon Ruby - 300 hours

Mario Kart DS - 200 hours

Pokemon Diamond - 275 hours

Mario Kart Wii - 200 hours

SSBBrawl - 215 hours

Holy Sh...

i don't know how much but heres in order of highest to lowest

EverQuest (my first ever MMO and it was all that i played for quite awhile) ,

PlanetSide ,(was and still groundbreaking FPS MMO)

CounterStrike ,(this is the first FPS to be popular in LAN over here , just about everytime i go out with friends we end up playing it)

WoW

Final Fantasy XI 

Elder Scrolls Daggerfall (loved this game on my old desktop , i often forget that i have a life outside of it)

Gears of War 1 and 2 - God knows how much time... Probably with the two games combined I would say around 1000 hours, possibly more. It is not uncommon for me to play the game for 5 hours in a single day sometimes. The definitive "go to game" for me these days...

Oblivion - around 100 hours

Pokemon Gameboy/GBA/DS games - probably around 300 hours combined. I believe Pokemon Red alone burned about 100 hours. Me and my friends were REALLY into that game back in the day.

Everquest - around 200 hours maybe? Though this is also a very rough estimate. When through a huge Everquest phase with a few friends, where we played almost every day during the course of a couple of years, sometimes over 4 hours a day.

Everquest 2 - 100 hours approx.. Didn't get as into this one as EQ1, as my friends who were playing the game with me all decided to bail for WoW, leaving me in the dust.

Mario Brothers 3 - Probably around 100 hours as well. One of my favorite games to this day. I played it so much as a child even my parents eventually got into it, and they rarely play video games.

Super Smash Bros/ melee/Brawl - Between the 3 Smash Bros, probably a good 200 hours. Nearly a hundred hours of Brawl, mainly playing online w/ my cousin.

Starcraft - Probably 100 hours. One of the few PC games I play, yet one of my favorite games. I still occassionally pick it up and start playing again, never seems to get old.

Fallout 3 (200 hours), Chrono Trigger (300 hours), Legacy of Kain: Blood Omen (100 hours), World of Warcraft (2 years of my existence), Deus Ex (200 hours), Fallout Tactics: Brotherhood of Steel (100 hours), and Super Mario Bros. 3 (countless hours when younger).

Mario Kart 64/DD/DS, Pokemon Blue and Silver and Modern Warfare 2 are my most played games

Not sure of the amount of hours but sports games without a doubt.

Fifa 10 and Football manager 10 are beasts when it comes to playing time consumption!

That is insane for Killzone 2. Such an over rated game.

Red Dead Redemption seems to be taking up a lot of my time too....