Games like PoPuP
Games like PoPuP include Hollow Knight, Celeste, Neva, Hollow Knight: Silksong, and SANABI. We matched them by the tags players give PoPuP on Steam (Adventure, Platformer, 2D Platformer, 2D, and Emotional): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Platformer · 2D · Adventure

Celeste
Shared: Platformer · 2D Platformer · Indie

Neva
Shared: Adventure · Platformer · Emotional

Hollow Knight: Silksong
Shared: 2D · Indie · Platformer

SANABI
Shared: Adventure · 2D Platformer · 2D

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

Pizza Tower
Shared: 2D Platformer · Platformer · Indie

Ori and the Will of the Wisps
Shared: Platformer · Adventure · Singleplayer

LIMBO
Shared: Platformer · Indie · Adventure

To the Moon
Shared: Adventure · Emotional · Indie

BEEP
Shared: Platformer · Adventure · 2D

GRIS
Shared: Adventure · Platformer · Indie

Dust: An Elysian Tail
Shared: Platformer · Adventure · 2D

Reventure
Shared: Adventure · Platformer · Indie

Shovel Knight: Treasure Trove
Shared: Platformer · Adventure · 2D

Mark of the Ninja
Shared: Platformer · 2D · Adventure

Rain World
Shared: Platformer · Indie · 2D

Finding Paradise
Shared: Adventure · Emotional · 2D

Planet of Lana
Shared: 2D Platformer · Platformer · Adventure

Rogue Legacy 2
Shared: Platformer · Adventure · Indie

VVVVVV
Shared: Platformer · 2D Platformer · Indie

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

Owlboy
Shared: Adventure · Platformer · 2D

Dead Cells
Shared: Adventure · 2D · Platformer