Games like The Moon Relax
Games like The Moon Relax include No Man's Sky, The Forest, Elite Dangerous, The Long Dark, and Empyrion - Galactic Survival. We matched them by the tags players give The Moon Relax on Steam (Space Sim, Adventure, Open World Survival Craft, Space, and Simulation): closest matches first, and among equally close ones the better-known games.

No Man's Sky
Shared: Open World Survival Craft · Space · Adventure

The Forest
Shared: Open World Survival Craft · Adventure · Action

Elite Dangerous
Shared: Space Sim · Space · Simulation

The Long Dark
Shared: Open World Survival Craft · Adventure · Atmospheric

Empyrion - Galactic Survival
Shared: Simulation · Open World Survival Craft · Space

EVE Online
Shared: Space Sim · Adventure · Space

Deliver Us The Moon
Shared: Adventure · Space · Action

Starbound
Shared: Open World Survival Craft · Adventure · Space

Outer Wilds
Shared: Space · Adventure · Exploration

Breathedge
Shared: Open World Survival Craft · Space · Adventure

Exo One
Shared: Space · Adventure · Atmospheric

Don't Starve Together
Shared: Open World Survival Craft · Adventure · Simulation

Green Hell
Shared: Open World Survival Craft · Action · Adventure

Kerbal Space Program
Shared: Space · Simulation · Space Sim

Terraria
Shared: Open World Survival Craft · Adventure · Exploration

Subnautica
Shared: Open World Survival Craft · Adventure · Exploration

ASTRONEER
Shared: Open World Survival Craft · Space · Adventure

X4: Foundations
Shared: Space Sim · Space · Simulation

Stranded Deep
Shared: Open World Survival Craft · Adventure · Exploration

Universe Sandbox
Shared: Space Sim · Simulation · Space

X Rebirth
Shared: Space · Space Sim · Simulation

Ancestors: The Humankind Odyssey
Shared: Open World Survival Craft · Adventure · Exploration

A Plague Tale: Requiem
Shared: Adventure · Action · Exploration

PEAK
Shared: Adventure · Exploration · Atmospheric