Games like Relax In Space
Games like Relax In Space include Kerbal Space Program, SpaceEngine, No Man's Sky, Elite Dangerous, and Universe Sandbox. We matched them by the tags players give Relax In Space on Steam (Exploration, Sandbox, Science, Space, and Space Sim): closest matches first, and among equally close ones the better-known games.

Kerbal Space Program
Shared: Sandbox · Space · Science

SpaceEngine
Shared: Sandbox · Space · Space Sim

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

Elite Dangerous
Shared: Exploration · Space · Space Sim

Universe Sandbox
Shared: Sandbox · Space · Space Sim

Kerbal Space Program 2
Shared: Sandbox · Exploration · Space

Slime Rancher
Shared: Exploration · Sandbox · First-Person

SPORE™
Shared: Sandbox · Exploration · Space

X4: Foundations
Shared: Space · Exploration · Sandbox

Avorion
Shared: Exploration · Sandbox · Space Sim

EVE Online
Shared: Exploration · Space Sim · Space

Spaceflight Simulator
Shared: Sandbox · Space · Space Sim

Starfield
Shared: Space · Exploration · Open World

Starbound
Shared: Sandbox · Space · Exploration

Outer Wilds
Shared: Exploration · Space · Open World

The Long Dark
Shared: Exploration · Sandbox · Open World

Exo One
Shared: Exploration · Space · Relaxing

Empyrion - Galactic Survival
Shared: Space · Exploration · Sandbox

PowerWash Simulator
Shared: Sandbox · Relaxing · 3D

Big Walk
Shared: Exploration · Sandbox · Open World

Internet Cafe Simulator 2
Shared: Exploration · Sandbox · 3D

Space Engineers
Shared: Sandbox · Space · Open World

ASTRONEER
Shared: Exploration · Space · Sandbox

Out of Ore
Shared: Sandbox · Exploration · 3D