Games like Star Boss
Games like Star Boss include Kerbal Space Program, Elite Dangerous, Spaceflight Simulator, X4: Foundations, and Cosmoteer: Starship Architect & Commander. We matched them by the tags players give Star Boss on Steam (Simulation, Space Sim, Word Game, Exploration, and Time Management): closest matches first, and among equally close ones the better-known games.
Kerbal Space Program
Shared: Simulation · Space Sim · Space
Elite Dangerous
Shared: Space Sim · Simulation · Exploration
Spaceflight Simulator
Shared: Space Sim · Simulation · Exploration
X4: Foundations
Shared: Simulation · Space Sim · Exploration
Cosmoteer: Starship Architect & Commander
Shared: Space Sim · 2D · Exploration
Empyrion - Galactic Survival
Shared: Simulation · Space Sim · Exploration
EVE Online
Shared: Space Sim · Exploration · Simulation
Kerbal Space Program 2
Shared: Exploration · Simulation · Space
Space Engineers
Shared: Simulation · Space · Building
Avorion
Shared: Space Sim · Exploration · Space
Dyson Sphere Program
Shared: Simulation · Space · Building
Stellaris
Shared: Simulation · Exploration · Space
Oxygen Not Included
Shared: Simulation · 2D · Building
Star Trucker
Shared: Space Sim · Simulation · Exploration
SPORE™
Shared: Simulation · Exploration · Space
Universe Sandbox
Shared: Simulation · Space Sim · Space
PULSAR: Lost Colony
Shared: Space Sim · Simulation · Exploration
Hardspace: Shipbreaker
Shared: Simulation · Space · Space Sim
No Man's Sky
Shared: Exploration · Space · Sci-fi
Endless Sky
Shared: Simulation · Space · 2D
V: Rings of Saturn
Shared: Exploration · Space Sim · Space
The Last Starship
Shared: Simulation · Space · Building
X Rebirth
Shared: Simulation · Space Sim · Space
Ostranauts
Shared: Simulation · Space Sim · Exploration