Games like Polyhop: The Skybound Islands
Games like Polyhop: The Skybound Islands include A Hat in Time, Only Climb: Better Together, Chained Together, Kao the Kangaroo: Round 2 (2003 re-release), and Lunistice. We matched them by the tags players give Polyhop: The Skybound Islands on Steam (Precision Platformer, 3D Platformer, Platformer, Casual, and Cute): closest matches first, and among equally close ones the better-known games.

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

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

Chained Together
Shared: Platformer · Casual · Adventure

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

Lunistice
Shared: 3D Platformer · Platformer · Cute

Toree 3D
Shared: 3D Platformer · Platformer · Cute

Celeste
Shared: Precision Platformer · Platformer · Cute

Spyro™ Reignited Trilogy
Shared: 3D Platformer · Adventure · Platformer

Pumpkin Jack
Shared: 3D Platformer · Adventure · Platformer

Placid Plastic Duck Simulator
Shared: Cute · Casual · Collectathon

Slime Rancher 2
Shared: Cute · Relaxing · Casual

Refunct
Shared: 3D Platformer · Casual · Platformer

Spirit of the North
Shared: Casual · Adventure · 3D Platformer

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

The Last Campfire
Shared: Cute · Adventure · 3D Platformer

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

Yooka-Laylee
Shared: 3D Platformer · Platformer · Adventure

A Short Hike
Shared: Cute · Adventure · Casual

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

PAC-MAN WORLD Re-PAC
Shared: 3D Platformer · Cute · 3D

Yooka-Replaylee
Shared: 3D Platformer · Platformer · Arcade

VHOLUME
Shared: 3D Platformer · Platformer · Casual

Get To Work
Shared: Precision Platformer · 3D Platformer · Adventure

Sonic Frontiers
Shared: 3D Platformer · Adventure · Platformer