Soul Eating Games

Total War series, especially Rome or Medieval 2.

Also the original Guild Wars.

FTL

EVE Online (you can pay for your sub with in-game money), any Monster Hunter game

Super meat boy!

Play Diablo 3 a lot and become a zombie.

Rome:Total War

Skyroooooom, Fallout series, and borderlands 2.

EVE is definitely one if you can get the hang of it

Dont Starve

Bethesda rpg-s, The Witcher games, GTA-s (or any other Rockstar game), Binding of Isaac, Football Manager (if you are cool and like football), Path of Exile (not a steam game, but still a game), Borderlands games (with a budy or two/three), I also highly recommend Persona 4 for the ps2 if you haven't played it (you can emulate it on pc), Shadow of the Colossus (another ps2 game)... and so on and so forth.

Sims 3 ;o

Gothic 1 and 2, if you like RPGs and don't mind playing older games. I still think they're some of the best games of all time.

Garry's mod haha

Dark souls. 60hrs in, still havent beaten it.

KILLING FLOOR

Witcher

Fuel ... It's my fav freeroaming offroad racing game.

You can try Grand Theft Auto games if you haven't played all of them.