Games like Sinkhole
Games like Sinkhole include Superflight, Keep on Mining!, PowerWash Simulator, AudioSurf, and Refunct. We matched them by the tags players give Sinkhole on Steam (3D Platformer, Casual, Arcade, 3D, and Relaxing): closest matches first, and among equally close ones the better-known games.

Superflight
Shared: Casual · Relaxing · Indie

Keep on Mining!
Shared: Casual · Relaxing · Arcade

PowerWash Simulator
Shared: Casual · Relaxing · 3D

AudioSurf
Shared: Casual · Arcade · Indie

Refunct
Shared: 3D Platformer · Relaxing · Casual

VHOLUME
Shared: 3D Platformer · Casual · Arcade

Librarian: Tidy Up the Arcane Library!
Shared: Relaxing · Casual · Singleplayer

hololive Treasure Mountain
Shared: Casual · Arcade · 3D Platformer

A Short Hike
Shared: Relaxing · Casual · Indie

Slime Rancher 2
Shared: Relaxing · Singleplayer · Casual

MUSYNX
Shared: Casual · Indie · Arcade

Unpacking
Shared: Casual · Relaxing · Singleplayer

Sizeable
Shared: Casual · Relaxing · Indie

Mountain
Shared: Casual · Relaxing · Indie

Potion Craft: Alchemist Simulator
Shared: Relaxing · Singleplayer · Indie

Assemble with Care
Shared: Casual · Relaxing · Indie

Zup! S
Shared: Casual · Indie · Relaxing

That's not my Neighbor
Shared: Casual · Choices Matter · Indie

Drift86
Shared: Casual · Arcade · Indie

House Flipper
Shared: Casual · Relaxing · Singleplayer

A Game About Feeding A Black Hole
Shared: Casual · Relaxing · Indie

Passpartout: The Starving Artist
Shared: Casual · Relaxing · Indie

Flower
Shared: Casual · Relaxing · Indie

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