Xbox360 - Gears of War.

thats is all good night.

hmm metal gear solid 4.

especially metal gear online.

Well heres my list of highly played games in a order i dont remember although its all well above 100 hours.

-Final Fantasy VII (PS1) ~737 Hours at the minimum Maybe even more im a true hardcore Final Fantasy VII Fan!.~
-Pokemon Blue, red and yellow Note: Combined (GBC) ~Over 400 Hours Easy cant really remember since i was only 8 to 11 years old at the time so my memory is foggy.~
-Super Smash Brothers Melee (NGC) ~Around 200 Hours.~
-Final Fantasy X (PS2) ~180 Hours give or take.~
-Dirge of Cerberus: Final Fantasy VII / Crisis Core: Final Fantasy VII Note: Combined (PS2/PSP) ~177 Hours in total i know, Crisis Core isnt really long Nor is dirge buti love the Final Fantasy VII Universe that much so...~
-Star Ocean: Till the end of Time AKA SO3 (PS2) ~In total i'd say around a good 200-300 Hours real great game from Tri-Ace infact i'd say imo its there 2nd best ever created, VP2 Silmeria for PS2 being number one, truth be told it was Star Ocean 3 that inspired me to start my own personal Comic/Flash game Series, cant wait for Star Ocean 4.~
-Glover 64 (N64) ~Slightly over 100 Hours cant remember since i was like 8 years old at the time.~
-Sonic Adventure 1 and 2 (NGC) ~150 Hours tops.~
-Soul Calibur II / Soul Calibur III (NGC/PS2) ~418 Hours somewere around there, the soulcalibur universe is the best fighting series imo to bad i think it ends with IV...~
-SoulCalibur IV (PS3) ~80 Hours and still kicking i expect it to be around 300 hours before i finally get bored, maybe more!~
-Oblivion Elder Scrolls IV (PS3) ~Exactly 84 Hours but will continue some day to reach 180 or so hours maybe.~
-Folklore / Enchanted Arms Note: Combined (PS3) ~Over 100 Hours.~
-Lost Planet: Extreme Condition (PS3) ~25 or so hours maybe a little more, but i will spend atleast 100 when all is said and done with this great title mainly due to the fun online.~
-WarHawk/Super StarDust HD Note: Combined (PS3) ~I dont really know about this one since i recent got WarHawk AND SSDHD, but when all is said and done i'd say a good 250-450 hours.~
-Chaos Legion (PS2) ~70 Hours and Rising, getting hyped for the 2nd game for PS3.~
-Gunz: The Duel USA Version (PC) ~Highly addictive game like many others i've played, one of the Few FREE Online 3rd person shooters that'll keep you busy and havin fun for a good long while, i still step up to play it to this day, Great PS3/PSP games coming out left to right and all, over 100 hours EASY, dont really have an exact opinion though.~
-Mu Online (PC) ~A nice free little MMO i used to play in my early teens clocked in at 217 hours.~
-World of Warcraft (PC) ~Haha You knew this was coming folks, well i have no idea i just know for one thing it was ALOT!!!~
-Super Street Fighter II (Snes) ~Been a long while i was about 5 years old or the like, i'd say over 100 hours though.~
-Super Mario World (Snes) ~Like Street Fighter i was only a kid (4 years old or around there) at the time so i dont remember maybe around 150 hours or so in total.~
-Super Mario Sunshine (NGC) ~Over 200 Hours, Best Mario game ever made imo.~
-Tales of Legendia (PS2) ~My first ever tales game, still trying to play this damn game im stuck though, but im at 47 hours so i may reach 100 soonner or later.~
-Drakenguard (PS2) ~Over 50 but will go for a 100 breaker later.~
-Drakenguard II (PS2) ~Sorta like Chaos Legion, Over 100 hours fer sure.~
-Kingdom Hearts (PS2) ~Over 100 Hours.~
-Kingdom Hearts II (PS2) ~Over 300 Hours i liked KH2 far more then 1~
-Valkria Profile II: Silmeria (PS2) ~Over 100 Hours, Most beautiful game on the PS2, this game looks better then Certain PS3/360 Games even, yes it looks that damn good! Best game made by tri-ace to this date imo.~

Well theres my List, its all that i can remember but as you can see i "WAS" a hardcore gamer back in the day, now an days i've toned it down but still "fairly" hardcore. good night now. :P

Streetfighter II on the SNES for me. Must have played it for thousands of hours over a four year span.

phantasy star online on dreamcast racked up nearly 500 hours untill phantast star online v2 came out which racked up another 500 hours

then onto phantasy star online ep 1&2 on gamecube which racked up 600 hours

then phantasy star universe on 360 which racked up 900 hours approx

Well I got addicted to Wow a few years ago, threw in there over 150 DAYS played time in it (3600 hours). Doom 1/2 is still my record (back when it came out late 93 start 94), over 7 years I poured possibly up to 7,000 hours into the game. Go the starting age of mods :)

EDIT:

I've thrown 100+ hours in the following games

FF games (DS,PS,PS2,PS3)
Quakeworld (to be honest I've possibly played this more then WoW :S)
Indy 500 (1989 game!)
chrono trigger - snes
Sonic 1 - Master System (although playing through took about 40 minutes, I basically played and clocked the game every day I had it until my MS died)

few others that I can't remember no doubt

Probably Harvest Moon 64.

You lose a lot of time in those greenhouses...

Mario Kart Wii, las time I had all the hours added up was a few months ago at 180 hours, since then I believe it must hae passed 250 hours, and be well on it's way to 300.

Although I don't have any way of knowing it accurately, I think F1WGP2 (N64) LoZ:Windwaker and Mario Kart 64 probably follow after it, all with somewhere between 200 and 250 hours.

Then LoZ:TP and RE4:Wii have both clocked over 180 hours on the Wii..... I have no idea what's next, probably Banjo Tooie or Goldeneye.

Too many to say, but possibly Zelda: Ocarina of Time, and Zelda: Link to the Past.

outside of my Xfire games I dunno, I have 1200 hours of Tactical Ops in Xfire but stopped playing it ~2 years ago. I don't have any game remotely close to it now.. maybe Goldeneye or ISS 64, but I doubt I played that much ANY other game.