No New Vegas, though?

Played through it once, then the DLC case, then all of them again. Also I played through the best bits and the show people as well. 

It's 102 hours to be exact.

anyone that plays MP competitively has done it. me included.
on a SP experience maybe on Jrpgs i cant remember anyone besides Pokemon

Borderlands 1 and 2, demon's souls (close to 300), dark souls (pretty close to demon's souls), Battlefield 3, maybe mass effect 2, and I think there might be a few more. Most games I've payed full price for, I play between 30 and 60 hours.

I'm gonna count single games and not series (like mass effect. Have played the series well above 100 hours, but not a single game).

WoW, SWTOR, probably TERA and maybe FFXIV: ARR by now.

FF7, FFTactics, Xenogears, Skyrim, Fallout 3, KOTOR.

Thats the ones i can remember.

Several GTA iterations
Several COD iterations
Several BF iterations
Several Halo iterations
Several PES iterations
Several FIFA iterations
Several The Sims iterations
Mario Kart 64

Sim City
Age of Empires II
Fuzion Frenzy 1/2
Zelda Ocarina of Time
Counter Strike
Command and Conquer Generals/Zero Hour
Smash Bros 64/Melee
Super Mario 64 (still play this game to this day)
Golden Eye 64
Perfect Dark 64
Mario Party 5

I'm sure there's more.

Steam tells me:

• Team Fortress 2
• Command & Conquer Red Alert 3

Mass Effect series, though ME3 I've easily spent 100 hours on the MP
Dragon Age: Origins
Pretty much every TES game I've played: Morrowind, Oblivion, Skyrim
Most Pokemon games: Red/Blue, Gold/Silver, Diamond/Pearl, Black/White, X/Y
Most Final Fantasy games: IV, V, VI, VII, Tactics, VIII, IX, X, XII (I replay them often)
Ocarina of Time (Another game I replay often)
Perfect Dark
GoldenEye 007
Super Mario World
Super Smash Bros. & Super Smash Bros. Melee
Mario Kart 64, Mario Kart: Double Dash
Minecraft
Civilization IV & V
SimCity 3000 & SimCity 2013
Pretty much every Sims game: The Sims 1-3
Ragnarok Online
World of Warcraft
Final Fantasy XIV

That's all I can think of off the top of my head o.o

Edit: MOAR

Fallout 3
Fallout: New Vegas
Halo:CE
Halo 2
StarCraft
StarCraft II
Total Annihilation
Runescape

Smash Bros Brawl, Pokemon Sapphire/Emerald/Platinum/SoulSilver/White, Metroid Prime/Prime 2/Prime 3/(ESPECIALLY)Prime Hunters/Fusion/Super Metroid, Infamous 1/2, Mario Kart DS/DD/Wii/7, Super Paper Mario, Uncharted (i think 2 had that awesome multiplayer?), Metal Gear Solid 4, Mario and Luigi Superstar Saga,Persona 4 Golden, Killzone Mercenary, Gravity Rush, Xenoblade Chronicles, Call of Duty 4, Super Mario Galaxy/2, Halo/2/3/4, and plenty of others.
some say time wasted, i say time well spent.
(Note: a lot of these seem like short games or whatever, but the 100+ hours are due to replayabillity of SP/MP, and huge amounts of content. i've finished games like Metroid Fusion over 30 times).

Heroes of Newerth - probably more than a 1000 hours.
Star Ocean The Last Hope - Easily over 100 hours on and off the last couple of years (still working on platinum)
Final Fantasy 7-9
Starcraft
Brood Wars
Warcraft 3 Frozen Throne (DotA)
Cross Edge
Final Fantasy Tactics
Call of Duty Modern Warfare 1 and 2
Call of Duty World at War
Call of Duty Black Ops

Zelda Ocarina of Time

Zelda Majora's Mask

Smash Bros. 64

Smash Bros. Melee

Golden Eye 64

Mario 64