Games like Space Pilgrim Academy: Reunion
Games like Space Pilgrim Academy: Reunion include Outer Wilds, Hollow Knight: Silksong, OneShot, There Is No Game: Wrong Dimension, and Deliver Us The Moon. We matched them by the tags players give Space Pilgrim Academy: Reunion on Steam (Adventure, Indie, 2D, Sci-fi, and Space): closest matches first, and among equally close ones the better-known games.

Outer Wilds
Shared: Adventure · Space · Story Rich

Hollow Knight: Silksong
Shared: Indie · 2D · Adventure

OneShot
Shared: Indie · Story Rich · Adventure

There Is No Game: Wrong Dimension
Shared: Indie · Adventure · Puzzle

Deliver Us The Moon
Shared: Adventure · Indie · Sci-fi

CrossCode
Shared: Indie · Female Protagonist · 2D

OPUS: Echo of Starsong - Full Bloom Edition
Shared: Indie · Female Protagonist · Story Rich

Space Pilgrim Episode I: Alpha Centauri
Shared: Adventure · Indie · Sci-fi

GRIS
Shared: Indie · Adventure · Female Protagonist

Broken Age
Shared: Adventure · Indie · Story Rich

Deponia
Shared: Adventure · Indie · Point & Click

Observation
Shared: Adventure · Indie · Sci-fi

Papers, Please
Shared: Indie · Singleplayer · Point & Click

To the Moon
Shared: Indie · Adventure · Story Rich

Carto
Shared: Indie · Adventure · Puzzle

The Turing Test
Shared: Sci-fi · Adventure · Space

Fran Bow
Shared: Adventure · Indie · Story Rich

Tomb Raider Game of the Year
Shared: Adventure · Female Protagonist · Story Rich

Celeste
Shared: Indie · 2D · Female Protagonist

Chants of Sennaar
Shared: Adventure · Indie · Puzzle

J.U.L.I.A.: Among the Stars
Shared: Adventure · Indie · Sci-fi

Tales of the Black Forest
Shared: Indie · Adventure · Female Protagonist

Little Misfortune
Shared: Indie · Adventure · Story Rich

Silence
Shared: Adventure · Indie · Story Rich