Games like Orion's Belt Expedition
Games like Orion's Belt Expedition include Slime Rancher, No Man's Sky, DAVE THE DIVER, Starfield, and Outer Wilds. We matched them by the tags players give Orion's Belt Expedition on Steam (Casual, Adventure, Point & Click, Exploration, and 2D): closest matches first, and among equally close ones the better-known games.

Slime Rancher
Shared: Adventure · Exploration · Open World

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

DAVE THE DIVER
Shared: Casual · Adventure · Exploration

Starfield
Shared: Space · Open World · Exploration

Outer Wilds
Shared: Exploration · Adventure · Space

Fallout 4
Shared: Exploration · Adventure · Open World

Starbound
Shared: Adventure · Space · Exploration

Crimson Desert Enhanced
Shared: Adventure · Exploration · Open World

Marvel’s Spider-Man Remastered
Shared: Adventure · Open World · Singleplayer

Hogwarts Legacy
Shared: Adventure · Open World · Exploration

STAR WARS Jedi: Survivor™
Shared: Adventure · Open World · Singleplayer

A Short Hike
Shared: Adventure · Exploration · Casual

SPORE™
Shared: Open World · Casual · Exploration

Endless Sky
Shared: Space · Open World · Adventure

Terraria
Shared: Adventure · 2D · Exploration

Rise of the Tomb Raider™
Shared: Adventure · Exploration · Singleplayer

Samorost 1
Shared: Casual · Point & Click · Space

ASTRONEER
Shared: Exploration · Space · Open World

There Is No Game: Wrong Dimension
Shared: Point & Click · Adventure · Casual

Elite Dangerous
Shared: Exploration · Space · Open World

That's not my Neighbor
Shared: Casual · Adventure · Point & Click

EVE Online
Shared: Adventure · Exploration · Open World

Scribblenauts Unlimited
Shared: Casual · Adventure · 2D

Monument Valley
Shared: Adventure · Casual · Exploration