Games like Hardspace: Shipbreaker
Games like Hardspace: Shipbreaker include Kerbal Space Program, Space Engineers, Universe Sandbox, Stellaris, and BeamNG.drive. We matched them by the tags players give Hardspace: Shipbreaker on Steam (Space, Sci-fi, Simulation, Physics, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Kerbal Space Program
Shared: Space · Simulation · Physics

Space Engineers
Shared: Space · Simulation · Sandbox

Universe Sandbox
Shared: Space · Simulation · Physics

Stellaris
Shared: Space · Sci-fi · Simulation

BeamNG.drive
Shared: Simulation · Physics · Destruction

Elite Dangerous
Shared: Space · Sci-fi · Simulation

Space Engineers 2
Shared: Space · Sci-fi · Sandbox

Kerbal Space Program 2
Shared: Space · Physics · Sandbox

X4: Foundations
Shared: Space · Simulation · Sci-fi

No Man's Sky
Shared: Space · Sci-fi · Sandbox

Dyson Sphere Program
Shared: Space · Simulation · Sci-fi

Teardown
Shared: Physics · Destruction · Sandbox

Garry's Mod
Shared: Physics · Sandbox · Singleplayer

People Playground
Shared: Physics · Sandbox · Singleplayer

X Rebirth
Shared: Space · Simulation · Sci-fi

Empyrion - Galactic Survival
Shared: Space · Simulation · Sandbox

Besiege
Shared: Simulation · Physics · Sandbox

FTL: Faster Than Light
Shared: Space · Sci-fi · Singleplayer

Brick Rigs
Shared: Destruction · Sandbox · Physics

Bridge Constructor Portal
Shared: Simulation · Physics · Puzzle

Spaceflight Simulator
Shared: Space · Simulation · Sandbox

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Physics

Starfield
Shared: Space · Sci-fi · Singleplayer

Portal
Shared: Sci-fi · Puzzle · Singleplayer