Garry's Mod
Garry's Mod: co-op, on Linux, PC and Mac, came out 24 December 2004.
Want to play Garry's Mod with friends?
Pick a night together in Lobbli: everyone marks when they are free, and you see which evening works.
Playing it together
Best with friends on prop hunt, Trouble in Terrorist Town or RP servers.
Pros
- Ready-made modes like prop hunt and Trouble in Terrorist Town
- Building and physics chaos is more fun with a group
Cons
- Strangers on roleplay servers can be toxic or creepy
- Player counts on many classic modes have dropped
Lobbli's AI summary of 34 Steam reviews about playing together, October 2026. It can get things wrong.Read them on Steam
Quick answers
From its Steam page: co-op, online play, crossplay.
Is Garry's Mod co-op?
Yes, Garry's Mod has a co-op mode.
How many players?
The catalogue does not list a player count yet.
Split screen?
No split screen mode is listed for it.
When did it come out?
24 December 2004.
Which platforms?
Linux, PC and Mac.
Can you play it online?
Yes, according to its Steam page.
Crossplay?
Yes, according to its Steam page.
What kind of game is it?
Simulator, Indie
Who makes it?
Facepunch Studios
About Garry's Mod
Garry's Mod is a physics-based sandbox game built on Valve's Source engine. In its base mode, there are no objectives. Players can spawn non-player characters, ragdolls, and props, then manipulate them using a physics gun that can pick up, rotate, and freeze objects in place. A tool gun provides additional functionality such as welding objects together or adjusting facial expressions on ragdolls. The game supports extensive Lua-based modding, and community-created game modes like Trouble in Terrorist Town and Prop Hunt have become widely popular in their own right. Originally released as a free mod for Half-Life 2 in 2004, it became a standalone commercial release in 2006 and holds the record as the best-selling PC-exclusive game.