Pretty sweet for a free game to play with your buddys

The half life series has some of the best campaigns well writen.

Who needs COD Zombies when you have Killing Floor

This game is actaully alot of fun for a game to just relax build a functioning prison or just let it go to ♥♥♥♥ and watch them riot :D check it out

Both the metro games are some of the best single player campaigns Metro Last Light Redux has both games with inproved graphics

Come on guys there is so much to do. Its the best sand box build basically anything you can think of or maybe hit up some dark rp for some roleplay?

The newest instalment to the counter strike series. the graphics are greatly inproved while still running on its old source engine.

This is where cs for me became a big part of my life

This game is the reason i started to play games on the pc when i was a kid.