Battlefield Bad Company 2
I don't know because I don't have timestamps from the 90's or early 2000's.
The only thing I know is that I put in a shit ton of hours into Unreal Championship 2, The Warriors, Team Fortress 2, and Left 4 Dead 1/2, the last two Steam says are a couple hundred hours
Street fighter 4 (all iterations) - 1000+
TF2. Oblivion, Dark Souls, Final Fantasy Tactics Advance - 300+
Its been quite some time, but the last Pokeman game I played had close to 600 hours on it and I haven't played WoW in close to 3 years and I would not want to know how much time I have on that.
I have no idea what game I've truly spent the most time playing (console player here), but I currently have 234 hours logged into BF3 for the 360 (thanks Battlelog). Although it's possible that I have played NBA 2K12 for more hours than that.
Various Halo and Call of Duty games have hundreds upon hundreds of my hours logged in as well.
Minecraft is up there too, even though I quit playing that regularly.
I sank easily over 100 hours into both Runescape and Warcraft, which is why I don't play MMOs anymore. Other games I've sunk over 100 hours into are Dragon Age Origins (Beat six times because I'm disgusting), Persona 3 (Beat 3 times), Final Fantasy 7 (3-4 times), and Final Fantasy 8 (3-4 times). I would say that I've probably sunk about that much time into Smash Bros Melee, Soul Calibur 4, and Tekken 3 with my friends too. Most of those were just because I didn't have any other games to play at the time, my playing habits are very different now.
Edit: Oh and my Soul Silver save may sit at 350 hours... But c'mon, EV training while I watch tv barely counts.
Outside of all the Pokemon games which I've spent a good couple hundred hours in many of them... Civ V has easily become the most time I've spent of a single game. Steam clocks me near 700 hours. Even though that's horribly innaccurate, the actual time I've spent playing is still pretty crazy. That's what you get for playing a match with every civ on Epic game length.
Right now Raptr says i have 291 hours in League of Legends, but i only installed Raptr about 2-4 months ago. Lets reason the rest out: I've played 1200 total classic games so at 30 minute average game i have at least 650hrs including dominion games.
Also Minecraft probably surpasses LOL but that whole year is a blur
Good question, now I'm" not 100% sure but off the top I'll say:
- WWF Smackdown! 2: Know Your Role (#1 by a large margin has to be)
- Phantasy Star Online (if you count the series, then this would probably be on par with or just under S2KYR)
- Capcom vs SNK 2
- Saga Frontier
I'm" pretty sure I've probably played games longer than some of those but I can't remember so these for me.