Games like Cupig's Key Collectathon
Games like Cupig's Key Collectathon include A Hat in Time, Yooka-Replaylee, Pikuniku, Portal 2, and VHOLUME. We matched them by the tags players give Cupig's Key Collectathon on Steam (Casual, Puzzle, Platformer, Arcade, and 3D Platformer): closest matches first, and among equally close ones the better-known games.

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

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

Pikuniku
Shared: Casual · Puzzle · Cute

Portal 2
Shared: Puzzle · Platformer · 3D Platformer

VHOLUME
Shared: Casual · 3D Platformer · Platformer

ALTF4
Shared: Runner · 3D Platformer · Arcade

Sizeable
Shared: Casual · Puzzle · 3D

hololive Treasure Mountain
Shared: Casual · Arcade · Puzzle

Donut County
Shared: Casual · Puzzle · Cute

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

FEZ
Shared: Puzzle · Platformer · Casual

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

Zup! S
Shared: Casual · Puzzle · Indie

Chained Together
Shared: Casual · Platformer · 3D Platformer

Lunistice
Shared: 3D Platformer · Platformer · Cute

Climb The Backrooms
Shared: Casual · Platformer · Puzzle

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

Strange Jigsaws
Shared: Casual · Puzzle · Adventure

Is This Seat Taken?
Shared: Casual · Puzzle · Cute

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

Toki Tori
Shared: Puzzle · Casual · Platformer

Unpacking
Shared: Casual · Puzzle · Cute

LIMBO
Shared: Puzzle · Platformer · Indie

Funi Raccoon Game
Shared: Casual · Platformer · 3D Platformer