Games like Pop Top Adventure
Games like Pop Top Adventure include Celeste, SANABI, Super Meat Boy, Sonic Mania, and Shovel Knight: Treasure Trove. We matched them by the tags players give Pop Top Adventure on Steam (Side Scroller, Action, Precision Platformer, 2D Platformer, and Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Platformer · 2D Platformer

SANABI
Shared: Action · 2D Platformer · Adventure

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

Sonic Mania
Shared: Platformer · 2D · Action

Shovel Knight: Treasure Trove
Shared: Platformer · Action · Adventure

Webbed
Shared: 2D Platformer · Cute · Platformer

VVVVVV
Shared: Precision Platformer · Platformer · 2D Platformer

Broforce
Shared: Action · Platformer · 2D

Skul: The Hero Slayer
Shared: Action · 2D · Platformer

Geometry Dash
Shared: Precision Platformer · 2D · Platformer

Sonic Origins
Shared: Action · 2D Platformer · Adventure

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

Jump King
Shared: Precision Platformer · Action · Adventure

Downwell
Shared: Precision Platformer · Platformer · Action

NINJA GAIDEN: Ragebound
Shared: Action · Side Scroller · 2D Platformer

Lone Fungus
Shared: 2D Platformer · Action · Adventure

Thomas Was Alone
Shared: Side Scroller · Platformer · 2D Platformer

Katana ZERO
Shared: Action · Platformer · 2D Platformer

Pizza Tower
Shared: 2D Platformer · Platformer · Action

Gato Roboto
Shared: Action · Adventure · 2D

Gal Guardians: Demon Purge
Shared: Action · 2D Platformer · Side Scroller

Smilemo
Shared: Action · Platformer · Adventure

Super Meat Boy Forever
Shared: Action · Precision Platformer · Platformer

Bloodstained: Curse of the Moon
Shared: Action · Side Scroller · Platformer