Paladins is a cheap alternative to the well known and extremely popular "Overwatch" developed by Blizzard Entertainment. It is probably the best free alternative to it's famous older brother.

Garry's Mod is probably one of the most enjoyable and funny games you can play with your friends of all time in my opinion.

Counter-Strike: Global Offensive is a multiplayer first-person shooter video game, There are two teams competing against each other one being terrorist and the other being counter terrorist.