Games like 4D Toys
Games like 4D Toys include Kerbal Space Program, Totally Accurate Battle Simulator, BONEWORKS, Poly Bridge, and People Playground. We matched them by the tags players give 4D Toys on Steam (Simulation, Indie, Education, Physics, and Sandbox): closest matches first, and among equally close ones the better-known games.

Kerbal Space Program
Shared: Simulation · Physics · Sandbox

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Physics

BONEWORKS
Shared: VR · Physics · Sandbox

Poly Bridge
Shared: Simulation · Physics · Indie

People Playground
Shared: Sandbox · Physics · Simulation

BeamNG.drive
Shared: Simulation · Physics · Sandbox

Garry's Mod
Shared: Sandbox · Physics · Simulation

X-Plane 11
Shared: Simulation · VR · Physics

Goat Simulator
Shared: Simulation · Physics · Sandbox

Space Engineers
Shared: Simulation · Sandbox · Physics

Hot Dogs, Horseshoes & Hand Grenades
Shared: VR · Simulation · Sandbox

Teardown
Shared: Physics · Sandbox · Indie

Universe Sandbox
Shared: Simulation · Sandbox · Physics

House Flipper
Shared: Simulation · Singleplayer · Sandbox

Poly Bridge 2
Shared: Simulation · Physics · Sandbox

Hard Bullet
Shared: VR · Simulation · Sandbox

Universe Sandbox
Shared: Simulation · Sandbox · Physics

鬼谷八荒 Tale of Immortal
Shared: Simulation · Singleplayer · Sandbox

NoLimits 2 Roller Coaster Simulation
Shared: Simulation · VR · Indie

BONELAB
Shared: VR · Physics · Sandbox

Blade and Sorcery
Shared: VR · Sandbox · Physics

Besiege
Shared: Simulation · Physics · Sandbox

Car Mechanic Simulator 2021
Shared: Simulation · Sandbox · Singleplayer

Microsoft Flight Simulator (2020) 40th Anniversary Edition
Shared: Simulation · VR · Singleplayer