How to Change Gamemode in GMod

Written by seth amery
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"Garry's Mod" is an independent sandbox game playable only through the Steam content delivery service. In order to run it, you must have a game installed that uses the Source engine, such as "Half-Life 2," "Left 4 Dead" or "Counter-Strike: Source." If you want to change the gamemode setting, you must navigate into the "server.cfg" configuration file, found within the installation folder.

Skill level:


  1. 1

    Open the folder where you chose to install "Garry's Mod." By default, this is in "C:\Program Files (x86)\Steam\steamapps\username\garry's mod\," where "username" is your Steam username.

  2. 2

    Double-click "server.cfg".

  3. 3

    Locate the "sv_defaultgamemode" option within the file, located toward the top. Change the gamemode to whatever option you want. For example, type "sandbox" for open-world gameplay or "SpaceBuild" for the Space Build game mode.

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