Tell me single p. games on PC, PS 2, Wii or on any consoles what have a lot of hours on it! (+GA)

Fallout 2 is solid. Arcanum: Of Steamworks and Magick Obscura was also a great RPG with an interesting world. Or there's the Mount and Blade series which looks like you could sink tons of time into it

give dragon age and mass effect series on the PC a try;
long and solid + addictive games on ps2 (which I have completed) are okami and final fantasy 12

Pokemon?

Right now I'm playing Fire Emblem with an emulator in my phone. The counter of the game says 26 hours, but everytime I restart a level(for whatever reason) the counter goes back. So I believe I've spent something like 80 hour in it.

Just Cause 2, probably one of the most underrated gems of all time

Also, the original Rome Total War and/or Medieval II. I still play both to this day, mods are endless.

I like all of the suggestions above, but The Last of Us has eaten up a metric f#$%-ton of my time in the last two years. I have replayed it through many times on both PS3 and PS4. I haven't enjoyed a game like this is a long time, and it is the first title I have played MP on in at least ten years.

Why not any Elder Scrolls game? Well, maybe Just Cause 2?

Edit: Damn, a thing with yellow hair ninja'd it. Guild Wars 1/2?

Edit 2: F$ck, single player games. Hmmm... Dragon Age Origins?

PS2 Radiata Stories..

I started playing Fallout (New Vegas) some time ago. Over 55h and I still have A LOT to do. Try it.

Any GTA you can find, I hear the Mass Effect & Dead Space are meant to be pretty long, if you do EVERYTHING that is, You could try stuff like Minecraft, The Forest, Day Z, 7 Days To Die, Rust, Steamworld Dig, Luftrausers, Really Big Sky/Big Sky Infinity...any of the games like Sid Meier's, Tropico, Total War, Sim City, Europa Universalis...apparently the Gothic & Risen games are good and decently long for the most part (or so I hear), The Darkness...

For PS2, Dark Cloud 2 and Rogue Galaxy are easily over 100 hours and have tons of content. Final Fantasy 12 also took me about 150 hours to do everything.

Wii is more or less just Smash Bros or Zelda Skyward Sword in terms of replay value and length. If you like light gun games, Resident Evil Darkside Chronicles is also packed with content, but it's only a few hours long. REDC can easily last over 50 hours if you try to unlock everything.

Also, the Baldur's Gate series!

Mass Effect series...Dragon Age: Origins...Skyrim.

The legend of dragoon,Resident evil 0,FF series is always an easy time sink.

Garrys Mod

Pretty much any RPG. If you don't mind the old graphics, Baldur's Gate 1 and 2 have hundreds of hours when you consider the expansions. Also Neverwinter Nights 1 and 2 have quite a bit of content (and look less old). And there's always Planescape Torment, one of the best RPG's (but it has fewer play hours than the ones with the expansions).

I'm surprised no one has mentioned these yet.

on the Wii:

Metroid Prime Trilogy
Xenoblade Chronicles

The Last Story

Pandora's Tower (if you like god of war you might like this one for the combat)

Little King's Story

Fragile Dreams (if you can get around some of the gameplay oddities, it's also pretty heavy on exploration and backtracking)

It might be difficult to find copies of some of those games at a good price nowadays though (except for Xenoblade since it's getting a NEW 3DS remake)

PC games I enjoyed:

Torchlight 1 and 2

The Incredible Adventures of Van Helsing (first one)

Cave Story+

Borderlands (the first one, second is a bit iffy on the balancing)

The Binding of Isaac

Sid Mier's Civilization V (has exploration but AI has a tendency to "cheat" on Deity, mostly multiplayer unless you're playing scenarios though)

Bioshock

Wii: Endless Ocean is fun to collect and explore; very relaxing, great soundtrack.
3/DS: Infinite Space - good luck finding it, but it'll take at least 3-5 playthroughs to see EVERYTHING and one playthrough takes FOREVER. Very great game though.
PC: So many to list; try out XCOM though?

Dragon Quest VIII on ps2

Super Mario Galaxy 1 & 2. They take a long time to complete and the huge world is so big it exists in the galaxy :b

super smash bros brawl for the wii

Big Rigs: Over the Road Racing

Fallout 1/2/3
Metal Gear Solid 1/2/3
Psychonauts
Beyond Good & Evil
Dark Souls
Terraria
Fable 1/2
Torchlight 2
Postal 2
Mass Effect 1/2
Dragon Age: Origins

Way of the Samurai 4 is coming to Steam in January, I had countless hours in #1 on PS2 so take a look at it.

Personal favorites:

• Mass Effect 1, 2, 3

• Borderlands 1, 2 GOTY (best with friends on co-op)

• Batman Arkham City

• Assasin's Creed 2 and 4

• Dark Siders 1, 2

• The Witcher (this one I just bought it, it is highly praised but I haven't played it yet)