Garry's Mod is a sandbox video game, originally created as a Mod for Half-Life 2. SMG4 is well known to use it.

Use in MarioMario54321's videos

Garry's Mod was only seen in MM54321's video Moon of Ender II: Endermite Swarm. The footage originated from another source, featuring Dr. Eggman waving a med PAC shouting "Pingas".

MM claims he lacks the game, but hopes to use it for future videos.

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