Garrys-mod-multiplayer -

The default mode where players use the Physics Gun and Tool Gun to build contraptions, experiment with ragdolls, or create collaborative scenes without strict objectives.

A game of deception where a group of "Terrorists" must figure out who among them are "Traitors" before they are all eliminated. garrys-mod-multiplayer

There are several ways to join or host a multiplayer session in 2026: How to Play With Friends in Garrys Mod (Gmod) - 2025 The default mode where players use the Physics