Games spent 100+ hours in

[Torin0101]

[Ad Bot]

[Gojira]

Kerbal Space Program.
I had a lot of fun with it but I really wish they had a larger atomic rocket motor part.

thisthisthisthisthisthisthisthisthislovingTHIS

[Max4344]

The Sims.

[viper30000]

Arma 2

Mount and Blade Warband

Payday the Heist and Stalker CoP

Red Orchestra

Fallout New Vegas

[Im_AFK]

roosterland
m@ngband
tes IV : oblivion
dragon ball z burst limit
halo ce
original guild wars
ass creed brotherhood

and many more

[Freeze]

TF2, Binding of Isaac, Terraria and probably some older games that don't have time spent timers.

[Doughboy]

the longest I have on the PC is Terraria with like 60 hours.
Longest time I've spent playing a game ever would be Star Wars battlefront 2 on ps2

[Qwepir]

jesus i dont even remember liking borderlands that much
i'd recommend all of these except global agenda