Games like Orbitous
Games like Orbitous include Elite Dangerous, EVE Online, Noita, No Man's Sky, and Kerbal Space Program. We matched them by the tags players give Orbitous on Steam (Adventure, Space Sim, Action Roguelike, Action, and Bullet Hell): closest matches first, and among equally close ones the better-known games.

Elite Dangerous
Shared: Space Sim · Space · Open World

EVE Online
Shared: Space Sim · Adventure · Open World

Noita
Shared: Physics · 2D · Action Roguelike

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

Kerbal Space Program
Shared: Space Sim · Space · Simulation

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · 2D

Dead Cells
Shared: Adventure · Action Roguelike · 2D

Endless Sky
Shared: Space · Adventure · Open World

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

Grand Theft Auto V Legacy
Shared: Action · Open World · Adventure

Rebel Galaxy
Shared: Adventure · Space · Space Sim

Red Dead Redemption 2
Shared: Adventure · Open World · Action

Grand Theft Auto IV: The Complete Edition
Shared: Action · Adventure · Open World

Enter the Gungeon
Shared: Action Roguelike · Bullet Hell · Adventure

Trailmakers
Shared: Action · Adventure · Space

SPORE™ Galactic Adventures
Shared: Adventure · Action · Space

X Rebirth
Shared: Space Sim · Action · Space

Rise of the Tomb Raider™
Shared: Adventure · Action · Open World

Just Cause™ 3
Shared: Action · Adventure · Open World

Space Engineers
Shared: Space · Open World · Physics

Starfield
Shared: Space · Open World · Adventure

LEGO® Star Wars™: The Skywalker Saga
Shared: Adventure · Action · Space

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

Crimson Desert Enhanced
Shared: Adventure · Action · Open World