Games like AstroNOTs
Games like AstroNOTs include Kerbal Space Program, X4: Foundations, Elite Dangerous, Hardspace: Shipbreaker, and Universe Sandbox. We matched them by the tags players give AstroNOTs on Steam (Simulation, Space Sim, Bullet Hell, 3D, and Space): closest matches first, and among equally close ones the better-known games.
Kerbal Space Program
Shared: Simulation · Space · Space Sim
X4: Foundations
Shared: Simulation · Space Sim · Space
Elite Dangerous
Shared: Space Sim · Space · Simulation
Hardspace: Shipbreaker
Shared: Simulation · Space · Singleplayer
Universe Sandbox
Shared: Simulation · Space Sim · Space
Spaceflight Simulator
Shared: Space Sim · Simulation · Space
Dyson Sphere Program
Shared: Space · Simulation · Space Sim
Empyrion - Galactic Survival
Shared: Simulation · Space · Space Sim
Space Engineers
Shared: Simulation · Space · Singleplayer
X Rebirth
Shared: Simulation · Space Sim · Space
Starpoint Gemini 2
Shared: Simulation · Space · Space Sim
SpaceEngine
Shared: Space Sim · Space · 3D
Solar Expanse - Space Exploration Manager
Shared: Simulation · Space · 3D
EVE Online
Shared: Space Sim · Simulation · Space
Between the Stars
Shared: Simulation · Space · Space Sim
Librarian: Tidy Up the Arcane Library!
Shared: Artificial Intelligence · Simulation · Singleplayer
Avorion
Shared: Space Sim · Space · 3D
STAR WARS™: Squadrons
Shared: Space · Simulation · Singleplayer
FTL: Faster Than Light
Shared: Space · Singleplayer · Simulation
Kerbal Space Program 2
Shared: Space · Simulation · Space Sim
Endless Sky
Shared: Space · Simulation · Singleplayer
X3: Terran Conflict
Shared: Simulation · Space · Space Sim
Starpoint Gemini Warlords
Shared: Simulation · Space · Space Sim
Cosmoteer: Starship Architect & Commander
Shared: Space · Singleplayer · Space Sim