Contraption Playground

Build something ridiculous, launch it through a target, and reset for another try.

Play solo inside Garry’s Mod with six real building materials and seven real weapon models read from your installed Dumb Ways to Build. Use GMod’s physics gun, gravity gun, and tool gun to cobble together ramps, levers, and catapults. A starter ramp gets you going, and a glowing target counts props you launch through it.

Open F6 for planks, boards, beams, metal sheets, cinder blocks, oil drums, and your arsenal: Nail Gun, Sledgehammer, Leaf Blower, Demolition Charge, Foam Gun, Grapple Hook, and Plunger Gun. Nail props together, blast them apart, pull them closer, lay temporary foam, and launch them across the playground. Weapon actions are adapted for GMod physics; this version uses GMod sounds and approximates Unity material shading.

Free building, unlimited ammunition, no timer, and a quick reset that restores the playground without clearing unrelated creations. GMod’s normal Q tools remain available. Solo only.

Requires installed copies of both games on 64-bit Windows. Dumb Ways to Build need not be running. Game content is read from your own copy at runtime and is never included in this download or copied into the other game. The launch isolates the playground from other addons for that session without removing them.

Credits: Garry’s Mod — Facepunch Studios. Dumb Ways to Build — PlaySide Studios. Original mashup code and sheets made with OpenAI Codex under the creator’s direction. Runtime tools: Python Software Foundation, UnityPy by K0lb3/Rudolf Kolbe, and reqwest by William Venner, with upstream notices included. Unofficial mashup.

Original mashup code and sheets: MIT license; remixes allowed. Neither game’s content is licensed by this project.