Games like Memoria
Games like Memoria include No Man's Sky, Deliver Us The Moon, Observation, Outer Wilds, and FTL: Faster Than Light. We matched them by the tags players give Memoria on Steam (Adventure, Indie, Space, Visual Novel, and Sci-fi): closest matches first, and among equally close ones the better-known games.

No Man's Sky
Shared: Space · Sci-fi · Adventure

Deliver Us The Moon
Shared: Adventure · Indie · Space

Observation
Shared: Adventure · Indie · Space

Outer Wilds
Shared: Space · Adventure · Indie

FTL: Faster Than Light
Shared: Space · Indie · Sci-fi

Chorus
Shared: Adventure · Indie · Space

Breathedge
Shared: Space · Indie · Sci-fi

Space Pilgrim Episode I: Alpha Centauri
Shared: Adventure · Space · Indie

Rebel Galaxy
Shared: Space · Adventure · Sci-fi

OPUS: Echo of Starsong - Full Bloom Edition
Shared: Visual Novel · Indie · Space

Starcom: Nexus
Shared: Space · Sci-fi · Adventure

Heat Signature
Shared: Space · Indie · Sci-fi

Tacoma
Shared: Adventure · Indie · Sci-fi

The Invincible
Shared: Adventure · Sci-fi · Space

Raging Loop
Shared: Adventure · Visual Novel · Indie

Cosmoteer: Starship Architect & Commander
Shared: Sci-fi · Space · Indie

Starfield
Shared: Space · Sci-fi · Adventure

LEGO® Star Wars™: The Skywalker Saga
Shared: Adventure · Space · Sci-fi

3030 Deathwar Redux - A Space Odyssey
Shared: Adventure · Indie · Space

Endless Sky
Shared: Space · Sci-fi · Adventure

SPACEPLAN
Shared: Indie · Space · Adventure

Starbound
Shared: Adventure · Space · Indie

Space Run
Shared: Space · Indie · Adventure

Florence
Shared: Indie · Adventure · Visual Novel