Games like Donuts in Space
Games like Donuts in Space include Portal 2, Sonic Adventure DX, SONIC X SHADOW GENERATIONS, VHOLUME, and Pseudoregalia. We matched them by the tags players give Donuts in Space on Steam (Casual, Platformer, 3D Platformer, 3D, and Space): closest matches first, and among equally close ones the better-known games.

Portal 2
Shared: Platformer · Singleplayer · 3D Platformer

Sonic Adventure DX
Shared: Platformer · 3D Platformer · Singleplayer

SONIC X SHADOW GENERATIONS
Shared: 3D Platformer · Platformer · 3D

VHOLUME
Shared: 3D Platformer · Platformer · Casual

Pseudoregalia
Shared: 3D Platformer · Platformer · 3D

Chained Together
Shared: Platformer · Casual · 3D Platformer

Kao the Kangaroo: Round 2 (2003 re-release)
Shared: 3D Platformer · Casual · Platformer

Sonic Frontiers
Shared: 3D Platformer · Singleplayer · 3D

Sonic Adventure 2
Shared: 3D Platformer · Platformer · Singleplayer

Mirror 2: Project X
Shared: 3D · Singleplayer · Casual

Refunct
Shared: 3D Platformer · Casual · Platformer

Defy Gravity Extended
Shared: Platformer · Space · Casual

Bloons TD 6
Shared: Casual · Singleplayer · 3D

Spark the Electric Jester 3
Shared: 3D Platformer · Platformer · 3D

Crash Bandicoot™ 4: It’s About Time
Shared: Platformer · 3D Platformer · 3D

Crash Bandicoot™ N. Sane Trilogy
Shared: 3D Platformer · Platformer · Singleplayer

Bro Falls
Shared: Casual · Platformer · 3D Platformer

SpaceEngine
Shared: Casual · Space · 3D

Only Climb: Better Together
Shared: 3D Platformer · Platformer · 3D

Neon White
Shared: 3D Platformer · Platformer · Singleplayer

BETON BRUTAL
Shared: 3D Platformer · Casual · Platformer

Climb The Backrooms
Shared: Casual · Platformer · 3D Platformer

A Story About My Uncle
Shared: Platformer · Singleplayer · 3D Platformer

Castle of Illusion
Shared: Platformer · Casual · Singleplayer

