From GMod Wiki
Here you can find player submitted player contraptions and tutorials. Note: Some of these contraptions may not work with the more recent updates because of tools breaking and files getting removed.
If you are looking at making your own please follow the Contraption guidelines and Contraption tips.
- Vehicles - Instructions on building vehicles.
- Contraption Tips - Some hints and tips on how to build like the pros
- Experimental Contraptions - Creations that test the versatility of Garry's Mod, or create an interesting effect
- Factory Items - Contraptions that do industrial work
- Minigames - Simple games to be played in Sandbox without using Lua
- Rube Goldberg - Some examples of Rube Goldberg devices
- Structures - Buildings, large external tools, fortresses, and other structures
- Traps - How to build traps for players and NPCs
- War Devices - Instructions on building contraptions that destroy things
- Wire Addon - All about the Wire Addon and how to build contraptions with it