Games like Astrosphere
Games like Astrosphere include Dyson Sphere Program, Oxygen Not Included, Kerbal Space Program, Space Haven, and Stellaris. We matched them by the tags players give Astrosphere on Steam (Exploration, Base Building, Space Sim, Simulation, and Management): closest matches first, and among equally close ones the better-known games.
Dyson Sphere Program
Shared: Base Building · Building · Space
Oxygen Not Included
Shared: Base Building · Building · Management
Kerbal Space Program
Shared: Simulation · Space Sim · Space
Space Haven
Shared: Base Building · Management · Simulation
Stellaris
Shared: Exploration · Strategy · Space
Prison Architect
Shared: Simulation · Base Building · Building
RimWorld
Shared: Base Building · Management · Strategy
Space Engineers
Shared: Building · Simulation · Base Building
Elite Dangerous
Shared: Space Sim · Exploration · Simulation
X4: Foundations
Shared: Simulation · Exploration · Space Sim
Kerbal Space Program 2
Shared: Exploration · Space · Building
No Man's Sky
Shared: Exploration · Space · Sci-fi
Manor Lords
Shared: Base Building · Simulation · Strategy
Jurassic World Evolution
Shared: Simulation · Building · Management
The Last Starship
Shared: Simulation · Building · Base Building
Cities: Skylines
Shared: Simulation · Management · Building
Cosmoteer: Starship Architect & Commander
Shared: Building · Exploration · Sci-fi
Jurassic World Evolution 2
Shared: Simulation · Management · Building
Empyrion - Galactic Survival
Shared: Simulation · Exploration · Space
Against the Storm
Shared: Base Building · Simulation · Strategy
The Alters
Shared: Base Building · Exploration · Management
Satisfactory
Shared: Base Building · Exploration · Building
Spacebase DF-9
Shared: Base Building · Simulation · Space
IXION
Shared: Base Building · Space · Strategy