My currently most played game. Not for it's sandbox but for the creations others have made. The game modes are splendid and it never gets boring. There is so much to do you could probably play a new game type every day for a month or two. I prefer TTT (Trouble In Terrorist Town) myself but for the less violence enthused there are game modes such as Prop Hunt or Dark RP. I hope this helped you make a good decision.