Games like StarShip Constructor
Games like StarShip Constructor include Space Engineers, Kerbal Space Program, Terraria, Reassembly, and Spaceflight Simulator. We matched them by the tags players give StarShip Constructor on Steam (Indie, Space, Building, Early Access, and Sandbox): closest matches first, and among equally close ones the better-known games.

Space Engineers
Shared: Space · Building · Sandbox

Kerbal Space Program
Shared: Space · Sandbox · Building

Terraria
Shared: Sandbox · 2D · Building

Reassembly
Shared: Space · Building · Sandbox

Spaceflight Simulator
Shared: Space · Sandbox · 2D

Oxygen Not Included
Shared: Building · 2D · Sandbox

Kerbal Space Program 2
Shared: Space · Building · Sandbox

Cosmoteer: Starship Architect & Commander
Shared: Building · Space · Indie

Starbound
Shared: Space · Sandbox · Indie

Dyson Sphere Program
Shared: Space · Building · Sandbox

People Playground
Shared: Sandbox · 2D · Building

StarMade
Shared: Space · Building · Sandbox

Avorion
Shared: Sandbox · Building · Space

Starship EVO
Shared: Indie · Building · Space

Kinetic Void
Shared: Space · Indie · Sandbox

Empyrion - Galactic Survival
Shared: Space · Building · Sandbox

Edge of Space
Shared: Indie · Sandbox · Space

Paralives
Shared: Indie · Building · Sandbox

Spacebase DF-9
Shared: Space · Indie · Building

Celestial Command
Shared: Space · Indie · Sandbox

Garry's Mod
Shared: Sandbox · Building · Indie

Space Engineers 2
Shared: Space · Building · Sandbox

Automation - The Car Company Tycoon Game
Shared: Building · Sandbox · Early Access

Prison Architect
Shared: Building · Sandbox · 2D