Games like Crapht Box
Games like Crapht Box include Garry's Mod, People Playground, Kerbal Space Program, Poly Bridge, and Stardew Valley. We matched them by the tags players give Crapht Box on Steam (Casual, Simulation, Indie, Sandbox, and Physics): closest matches first, and among equally close ones the better-known games.

Garry's Mod
Shared: Sandbox · Casual · Physics

People Playground
Shared: Sandbox · Physics · Simulation

Kerbal Space Program
Shared: Simulation · Sandbox · Physics

Poly Bridge
Shared: Simulation · Physics · Sandbox

Stardew Valley
Shared: Simulation · Sandbox · Indie

Poly Bridge 2
Shared: Simulation · Physics · Sandbox

Goat Simulator
Shared: Simulation · Sandbox · Casual

Besiege
Shared: Simulation · Sandbox · Physics

Bridge Constructor Portal
Shared: Simulation · Physics · Puzzle

Terraria
Shared: Sandbox · 2D · Indie

Noita
Shared: Physics · Sandbox · Indie

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Physics

Space Engineers
Shared: Sandbox · Simulation · Physics

while True: learn()
Shared: Simulation · Indie · Education

House Flipper
Shared: Simulation · Casual · Sandbox

Game Dev Tycoon
Shared: Simulation · Indie · Casual

Universe Sandbox
Shared: Simulation · Sandbox · Physics

Papers, Please
Shared: Simulation · Indie · Puzzle

Zup! S
Shared: Casual · Indie · Physics

Crazy Machines 3
Shared: Simulation · Physics · Sandbox

Human Resource Machine
Shared: Casual · Indie · Simulation

Graveyard Keeper
Shared: Simulation · Sandbox · Indie

PC Building Simulator
Shared: Simulation · Sandbox · Education

Universe Sandbox
Shared: Simulation · Sandbox · Physics

