Games like Fantastic Contraption
Games like Fantastic Contraption include Bridge Constructor Portal, Poly Bridge, Poly Bridge 2, Portal, and Hardspace: Shipbreaker. We matched them by the tags players give Fantastic Contraption on Steam (Puzzle, Strategy, Physics, Building, and Puzzle Platformer): closest matches first, and among equally close ones the better-known games.

Bridge Constructor Portal
Shared: Puzzle · Strategy · Physics

Poly Bridge
Shared: Puzzle · Physics · Building

Poly Bridge 2
Shared: Puzzle · Physics · Building

Portal
Shared: Puzzle · Puzzle Platformer · Physics

Hardspace: Shipbreaker
Shared: Physics · Puzzle · Simulation

PC Building Simulator
Shared: Building · Simulation · Immersive Sim

BONEWORKS
Shared: VR · Physics · Puzzle

shapez 2 - Factory
Shared: Strategy · Building · Puzzle

Besiege
Shared: Physics · Building · Simulation

Crazy Machines 3
Shared: Puzzle · Strategy · Physics

Portal 2
Shared: Puzzle · Puzzle Platformer · First-Person

House Flipper
Shared: Building · Simulation · Strategy

Mini Motorways
Shared: Strategy · Puzzle · Simulation

Poly Bridge 3
Shared: Puzzle · Physics · Building

Mini Metro
Shared: Puzzle · Strategy · Simulation

Garry's Mod
Shared: Physics · Building · First-Person

BONELAB
Shared: VR · Physics · Puzzle

Kerbal Space Program
Shared: Physics · Simulation · Building

Totally Accurate Battle Simulator
Shared: Strategy · Physics · Simulation

Cheap Car Repair
Shared: Puzzle · Simulation · Immersive Sim

ISLANDERS
Shared: Strategy · Puzzle · Building

Infinifactory
Shared: Puzzle · Building · Simulation

House Builder
Shared: Building · Puzzle · Simulation

Zup! S
Shared: Puzzle · Physics · Strategy