I have ~100 games on Steam and I can confess to not spending much time with most of them. Then there are some game I've played for hundreds of hours...
Garry's Mod - 583 hours (I mostly played the Jailbreak game mode. It's unique and rewards both patience and quick thinking.)
Skyrim - 349 hours (Glorious Argonian master race.)
The Sims 3 - 305 hours (I don't even know how or why I played so much of it)
Civilization V - 250 hours (Expansions make this the best game in the series, I say.)
Europa Universalis IV - 228 hours (Makes Civilization look like a casual game. It'll probably pass Civ in the next few months.)
Terraria - 110 hours (Good times on multiplayer. Not so good times otherwise.)
Garry's Mod - 583 hours (I mostly played the Jailbreak game mode. It's unique and rewards both patience and quick thinking.)
Skyrim - 349 hours (Glorious Argonian master race.)
The Sims 3 - 305 hours (I don't even know how or why I played so much of it)
Civilization V - 250 hours (Expansions make this the best game in the series, I say.)
Europa Universalis IV - 228 hours (Makes Civilization look like a casual game. It'll probably pass Civ in the next few months.)
Terraria - 110 hours (Good times on multiplayer. Not so good times otherwise.)