Games like Into the Sinkhole
Games like Into the Sinkhole include Celeste, Bō: Path of the Teal Lotus, Toree 3D, Thomas Was Alone, and Momodora: Reverie Under The Moonlight. We matched them by the tags players give Into the Sinkhole on Steam (Precision Platformer, Exploration, Side Scroller, 2D Platformer, and 3D Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · 2D Platformer · Platformer

Bō: Path of the Teal Lotus
Shared: Precision Platformer · Exploration · Side Scroller

Toree 3D
Shared: 3D Platformer · Platformer · Exploration

Thomas Was Alone
Shared: Side Scroller · Precision Platformer · Platformer

Momodora: Reverie Under The Moonlight
Shared: Side Scroller · 2D Platformer · Exploration

Prince of Persia The Lost Crown
Shared: Exploration · 2D Platformer · Side Scroller

A Hat in Time
Shared: 3D Platformer · Cute · Exploration

Super Meat Boy
Shared: Precision Platformer · Platformer · 2D Platformer

Webbed
Shared: 2D Platformer · Exploration · Cute

Blue Fire
Shared: Exploration · Precision Platformer · 3D Platformer

VVVVVV
Shared: Precision Platformer · 2D Platformer · Platformer

Toree 2
Shared: 3D Platformer · Exploration · Precision Platformer

BETON BRUTAL
Shared: Precision Platformer · 3D Platformer · Exploration

Afterimage
Shared: 2D Platformer · Side Scroller · Exploration

BIT.TRIP Presents... Runner2: Future Legend of Rhythm Alien
Shared: Precision Platformer · Side Scroller · Platformer

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

Leap Year
Shared: Precision Platformer · Exploration · 2D Platformer

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

Pseudoregalia
Shared: 3D Platformer · Exploration · Platformer

Thank Goodness You're Here!
Shared: Exploration · 2D Platformer · Platformer

Slime Rancher
Shared: Exploration · Cute · Colorful

Hot Lava
Shared: Precision Platformer · Exploration · 3D Platformer

Geometry Dash
Shared: Precision Platformer · Platformer · Side Scroller

Lunistice
Shared: 3D Platformer · Platformer · Cute