Games like Cosmonious High
Games like Cosmonious High include Slime Rancher, No Man's Sky, Starfield, PRAGMATA, and Elite Dangerous. We matched them by the tags players give Cosmonious High on Steam (Adventure, Colorful, Funny, Sci-fi, and Singleplayer): closest matches first, and among equally close ones the better-known games.
Slime Rancher
Shared: Adventure · Singleplayer · Colorful
No Man's Sky
Shared: Space · Sci-fi · Adventure
Starfield
Shared: Space · Singleplayer · Sci-fi
PRAGMATA
Shared: Sci-fi · Adventure · Funny
Elite Dangerous
Shared: Space · Sci-fi · VR
Totally Accurate Battle Simulator
Shared: Funny · Sandbox · Singleplayer
STAR WARS Jedi: Survivor™
Shared: Adventure · Singleplayer · Sci-fi
Firewatch
Shared: Adventure · Singleplayer · Walking Simulator
Trailmakers
Shared: Space · Adventure · Singleplayer
SPORE™
Shared: Sandbox · Space · Funny
Outer Wilds
Shared: Adventure · Space · Exploration
Ratchet & Clank: Rift Apart
Shared: Adventure · Singleplayer · Action-Adventure
The Solus Project
Shared: Adventure · VR · Sci-fi
Five Nights at Freddy's: Secret of the Mimic
Shared: Adventure · VR · Action-Adventure
Fallout 4
Shared: Adventure · Singleplayer · Exploration
SPORE™ Galactic Adventures
Shared: Adventure · Space · Singleplayer
Marvel's Guardians of the Galaxy
Shared: Singleplayer · Action-Adventure · Adventure
Portal 2
Shared: Singleplayer · Funny · Adventure
Breathedge
Shared: Singleplayer · Space · Sci-fi
STAR WARS™: Squadrons
Shared: VR · Space · Sci-fi
Slime Rancher 2
Shared: Colorful · Singleplayer · Adventure
Kerbal Space Program 2
Shared: Space · Sandbox · Funny
VRChat
Shared: VR · Funny · Adventure
LEGO® Star Wars™: The Skywalker Saga
Shared: Adventure · Space · Sci-fi