Games like Reassembly
Games like Reassembly include Space Engineers, Kerbal Space Program, Oxygen Not Included, Terraria, and Cosmoteer: Starship Architect & Commander. We matched them by the tags players give Reassembly on Steam (Building, Space, Sandbox, Strategy, and 2D): closest matches first, and among equally close ones the better-known games.
Space Engineers
Shared: Building · Sandbox · Space
Kerbal Space Program
Shared: Space · Sandbox · Building
Oxygen Not Included
Shared: Building · Sandbox · 2D
Terraria
Shared: Sandbox · 2D · Building
Cosmoteer: Starship Architect & Commander
Shared: Building · Space · 2D
No Man's Sky
Shared: Space · Open World · Sandbox
Kerbal Space Program 2
Shared: Space · Sandbox · Building
Dyson Sphere Program
Shared: Space · Building · Sandbox
Stellaris
Shared: Space · Strategy · Sandbox
Space Engineers 2
Shared: Building · Sandbox · Space
People Playground
Shared: Sandbox · 2D · Building
Space Pirates and Zombies
Shared: Space · Action · Strategy
Jurassic World Evolution
Shared: Building · Strategy · Sandbox
FTL: Faster Than Light
Shared: Space · Strategy · Indie
Garry's Mod
Shared: Sandbox · Building · Singleplayer
Prison Architect
Shared: Building · Sandbox · Strategy
Mount & Blade II: Bannerlord
Shared: Strategy · Sandbox · Open World
Empyrion - Galactic Survival
Shared: Space · Building · Sandbox
TerraTech
Shared: Building · Sandbox · Open World
Endless Sky
Shared: Space · 2D · Singleplayer
Avorion
Shared: Sandbox · Building · Space
SPORE™ Galactic Adventures
Shared: Space · Action · Sandbox
Trailmakers
Shared: Space · Action · Singleplayer
Spaceflight Simulator
Shared: Sandbox · Space · 2D