Garry's Mod
Built on a modified version of Valve’s Source engine, Garry’s Mod (or GMod for short) is a physics sandbox game. One of the great strengths of Garry’s Mod is that it is incredibly modder friendly. This has lead to a thriving community that is always coming up with new addons and gamemode for everyone to enjoy. Create constructions with moving parts. Create a car and drive it around. Create a rocket and fly it to the moon. You can play Garry’s Mod with your friends online, allowing you to cooperatively build together Garry’s Mod benefits from a rich productive community – so there’s always new addons to try Installing addons is achieved in a single click There are a lot of gamemodes to play, and trying them is as easy as joining a server