Games like Star Explorers
Games like Star Explorers include No Man's Sky, Elite Dangerous, Starfield, EVE Online, and Kerbal Space Program. We matched them by the tags players give Star Explorers on Steam (Space Sim, Space, Retro, Open World, and Procedural Generation): closest matches first, and among equally close ones the better-known games.

No Man's Sky
Shared: Space · Open World · Exploration

Elite Dangerous
Shared: Space Sim · Space · Open World

Starfield
Shared: Space · Open World · Exploration

EVE Online
Shared: Space Sim · Open World · Space

Kerbal Space Program
Shared: Space · Space Sim · Sandbox

Fallout 4
Shared: Open World · Exploration · Atmospheric

Rebel Galaxy
Shared: Space · Open World · Space Sim

X4: Foundations
Shared: Space · Space Sim · Open World

Outer Wilds
Shared: Space · Exploration · Atmospheric

X Rebirth
Shared: Space · Space Sim · Open World

Rodina
Shared: Space · Open World · Exploration

Avorion
Shared: Space Sim · Space · Open World

Kerbal Space Program 2
Shared: Space · Exploration · Sandbox

The Long Dark
Shared: Open World · Atmospheric · Exploration

Endless Sky
Shared: Space · Open World · Sci-fi

Fallout: New Vegas
Shared: Open World · Exploration · RPG

Cyberpunk 2077
Shared: Open World · Atmospheric · RPG

Empyrion - Galactic Survival
Shared: Space · Space Sim · Open World

Deliver Us The Moon
Shared: Space · Indie · Atmospheric

Breathedge
Shared: Space · Indie · Sandbox

SPORE™
Shared: Open World · Space · Sandbox

Starcom: Unknown Space
Shared: Space · Space Sim · Open World

Space Engineers
Shared: Space · Open World · Sandbox

SpaceEngine
Shared: Open World · Space · Space Sim