This game, although in development, will provide you with a lot of fun, and some moments to remember when playing with friends.

Hats.

This is a very fun, popular sandbox. There's no doubt you've heard of it. Garry's mod will keep you, and your friends occupied forever.

This game is a fun first-person survival both for someone wanting a single-player shooter, or to team up with your friends and loot towns.

This game is a great game for gaming groups, and factions alike. You can have a lot of fun creating strategies and communicating between your friends.