Games like Forbidden Snack
Games like Forbidden Snack include Celeste, Super Meat Boy, SANABI, Downwell, and Shovel Knight: Treasure Trove. We matched them by the tags players give Forbidden Snack on Steam (Adventure, Precision Platformer, 2D, Arcade, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Pixel Graphics · Platformer

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

SANABI
Shared: Pixel Graphics · Adventure · 2D

Downwell
Shared: Precision Platformer · Pixel Graphics · Arcade

Shovel Knight: Treasure Trove
Shared: Pixel Graphics · Platformer · Adventure

VVVVVV
Shared: Precision Platformer · Pixel Graphics · Platformer

Jump King
Shared: Precision Platformer · Adventure · Pixel Graphics

UFO 50
Shared: Pixel Graphics · 2D · Arcade

Owlboy
Shared: Adventure · Pixel Graphics · 2D

I Wanna Maker
Shared: Precision Platformer · 2D Platformer · Arcade

Out There Somewhere
Shared: Adventure · Pixel Graphics · Platformer

Reventure
Shared: Adventure · Pixel Graphics · 2D

The End Is Nigh
Shared: Precision Platformer · Adventure · Platformer

Sonic Mania
Shared: 2D · Platformer · Adventure

The Messenger
Shared: Platformer · Pixel Graphics · 2D

Sonic Origins
Shared: Adventure · 2D Platformer · Pixel Graphics

Exit the Gungeon
Shared: Adventure · Arcade · 2D

Pizza Tower
Shared: 2D Platformer · Platformer · Pixel Graphics

Geometry Dash
Shared: 2D · Precision Platformer · Platformer

Dead Cells
Shared: Adventure · 2D · Pixel Graphics

Super Mombo Quest
Shared: Adventure · Precision Platformer · Arcade

Bloodstained: Curse of the Moon
Shared: Pixel Graphics · 2D · Platformer

Volgarr the Viking
Shared: Platformer · Adventure · 2D

Rogue Legacy 2
Shared: Arcade · Adventure · Platformer

