Games like Evochron Legacy SE
Games like Evochron Legacy SE include Elite Dangerous, No Man's Sky, X4: Foundations, EVE Online, and Kerbal Space Program. We matched them by the tags players give Evochron Legacy SE on Steam (Space Sim, Simulation, Space, Exploration, and First-Person): closest matches first, and among equally close ones the better-known games.

Elite Dangerous
Shared: Space Sim · Space · Exploration

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

X4: Foundations
Shared: Simulation · Space · Space Sim

EVE Online
Shared: Space Sim · Exploration · Space

Kerbal Space Program
Shared: Simulation · Space · Space Sim

Starfield
Shared: Space · Open World · Exploration

X Rebirth
Shared: Simulation · Space · Space Sim

Empyrion - Galactic Survival
Shared: Simulation · Space · Space Sim

Space Engineers
Shared: Space · Simulation · Sandbox

Kerbal Space Program 2
Shared: Space · Exploration · Sandbox

Slime Rancher
Shared: Exploration · First-Person · Open World

Stellaris
Shared: Space · Exploration · Simulation

Avorion
Shared: Space Sim · Exploration · Sandbox

Endless Sky
Shared: Space · Simulation · Open World

PULSAR: Lost Colony
Shared: Space Sim · Simulation · Space

SpaceCraft
Shared: Space · Open World · Sci-fi

Hardspace: Shipbreaker
Shared: Space · Simulation · Sci-fi

SPORE™ Galactic Adventures
Shared: Simulation · Space · Exploration

Rebel Galaxy
Shared: Space · Open World · Space Sim

ASTRONEER
Shared: Space · Exploration · Open World

STAR WARS™: Squadrons
Shared: Space · Simulation · Sci-fi

SPORE™
Shared: Simulation · Sandbox · Open World

Spaceflight Simulator
Shared: Space Sim · Space · Simulation

The Long Dark
Shared: Exploration · Open World · First-Person