What game did you spend most of your time on?

My game would be Kingdoms of Amalur: Reckoning with a total of 29H 31M 44S.

One I can name off the top of my head would be Fallout 3 150+ hrs :o

This generation it was Lost Odyssey (well so far anyway), 65h 31mins and totally worth it.

Altogether probably Civ IV or Sid Meier's Alpha Centauri / Alien Crossfire, but those came before I started recording my playtimes...

I've been meaning to play Fate: Gates of Dawn since forever, that's easily 200+ hours, but I'm afraid it might not have aged well :O Anyone here who played it? It's not in the database yet.

Overall hours would have to go to Halo Reach or Halo 3. I don't know about Halo 3 time but I have over 400 hours on Reach. Singleplayer only would be Deus Ex Human Revolution. Probably about 70 hours, beat it 3 separate times.

For me the most by far is EverQuest and its many expansions. I was quite addicted to this game and still am though I do not play it anymore. It's tough to say how much time I spent, but a low estimate would be around 4600 hours. Wouldn't say it's the best game ever, but it was the most addictive game I ever played.

By far, it's Pokemon HeartGold, this generation or any other. Over two hundred hours in that sucker... >.>"

If I'm not wrong... The World Ends with You, the RPG for the DS. Like 200 hours or so because I really wanted to play it 100%. All pins, all objects, the GOD ranking... But it's as tough as enjoyable, one of the best games I've ever played ^^

Dark Souls with a total of 131 hours

so far mine is demon souls at like 70hrs and COD modern warefare at like i think around 4 days of playtime

oblivion got to be nearly 2500 hours and it is still climbing

Stepmania. I started something like 8 years ago and am still putting in about about an hour a day to this day. Which even tops the ~150-200 days or so of WoW /played.. Somehow. o.O

MMO = WoW, hundreds of days.
non-MMO in recent memory = Kingdoms of Amalur, 70-something hours.
non-MMO expected to overtake that soon = Disgaea 2. On the first one I spent over 100 hours when I played it years ago.

Hard to say. I can list some though!

Oblivion, Super Ghouls 'N' Ghosts, Super Smash Bros Melee, Donkey Kong Country, Spyro, Crash Bandicoot, Tomba, etc.

For this generation, Skyrim with 165 hours. Although ever would have to be Halo 2...I used to be part of a clan and we'd play for hours a night for about two years. I can imagine that my hours in that game span the thousands. Diablo 2 is pretty high up there too.

Easily over 200 hours playing Skyrim and about 160+ hours in Fallout New Vegas.

I don't spend a lot of time on games. I think when they start to reach around 50ish hours it gets a little umfortable and stop playing them (As such, JRPG's are not for me). Ironically though, I probably spent over a hundred hours on Oblivion and I didn't realize it. At the time, my old Xfire account made me aware of this. I was pretty blown away.

At least 200 hours:

WoW: 1,500 hours
Starcraft 2: 850 hours
Counterstrike Condition Zero: 530 hours
Left 4 Dead: 210 hours (150 more hours for L4D2)
Diablo 3: 210 hours

There are older games like Diablo 2 and Fallout 2 that I played before time tracking all the time and even now have over 100 hours, so they're probably several hundred hours each. Then there are console games like Goldeneye and Mario 64 that I would do everything I could in the game and more (like just goofing around and making my own goals).

When Fallout 3 first came out I spent just a little bit more time than I should have roaming the landscapes. <.< But then my save filed got wiped and I could never really get back into it... Dx

oblivion about 1700 hour's hybrid heaven about 780 hours tf2 54 hours

Single player I'd have to go Final Fantasy XII, beat it twice and close to 200 hours. Ocarina of Time I've probably beat over a dozen times so I don't even know the time for that. Super Smash Bros. Melee and Brawl I've put hundreds of hours on both playing with friends and getting all of the extra stuff.

Mine must be red dead redemption, think I put about 300 hrs or so into that, loved playing online.

MMOs = Maple Story, which I played for about 2.5 years (not sure how many hours but I'm guessing a lot)
Other multiplayer games = Since I very rarely play multiplayer, it's probably Diablo 3 with about 150 hours.
Singleplayer = An excellent roguelike called ADOM or Ancient Domains of Mystery, used to play this for quite a few years, and I never even managed to beat it (yeah, it's quite a difficult game. Also, could be that I just suck at it).

I think Animal Crossing New Leaf with around 100 hours

Football Manager 2008: i had 3 saves where i spent over 160 hours each and countless other that were over 50 hours. Anytime I wanted to play Football manager I loaded the 08 and haven't bought a newer version since 08. Over the last 6 years i must have put in it around 800 hours.
Oblivion and Skyrim: played each with 5-6 different characters averaging 60 hours on each playtrough. So that's around 300-350 hours on each game.
I play most RPGs with at least two different characters so i probably spent over 100 hours in a lot of them.

Runescape - Haven't played in years but i checked my account when i heard they added some adventurer's journal in there. It was around 200 days played.

World of warcraft - I have like 10 level 90s in there, plus i used to PvP a lot. So that's probably 2000+ hours.

Final Fantasy VII/VIII - Wasted close to 1000 hours each. Multiple save games on both with over 100 hours played.

X-moto - It's a 2D motocross game, similar to Elastomania (Played this too for quite a long time). The game is open source and it was released in 2005. I've played since late 05/early 06. I was active player in there until 2011 and then i quit. I still go there like twice a year to check how things are going. I had beaten over 300 world records in that game and i was one of the top 10 players at one point. I've played this game for thousands of hours. Way more than runescape.