Games like Wild Castle
Games like Wild Castle include Celeste, SANABI, Webbed, Shovel Knight: Treasure Trove, and Sonic Origins. We matched them by the tags players give Wild Castle on Steam (Adventure, Platformer, Collectathon, 2D Platformer, and Puzzle Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Platformer · Pixel Graphics · 2D Platformer

SANABI
Shared: Adventure · Pixel Graphics · 2D Platformer

Webbed
Shared: 2D Platformer · Puzzle Platformer · Pixel Graphics

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

Sonic Origins
Shared: Adventure · 2D Platformer · Platformer

Out There Somewhere
Shared: Platformer · Adventure · Pixel Graphics

Sonic Mania
Shared: Platformer · 2D · Adventure

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

LIMBO
Shared: Platformer · Puzzle Platformer · Adventure

Dead Cells
Shared: Adventure · 2D · Pixel Graphics

The Messenger
Shared: Platformer · Retro · Pixel Graphics

VVVVVV
Shared: Platformer · Pixel Graphics · 2D Platformer

ElecHead
Shared: Platformer · Puzzle Platformer · Adventure

Reventure
Shared: Adventure · Platformer · Pixel Graphics

Owlboy
Shared: Adventure · Platformer · Pixel Graphics

FEZ
Shared: Platformer · Adventure · Pixel Graphics

Moonleap
Shared: Platformer · Puzzle Platformer · Adventure

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

Antonball Deluxe
Shared: Adventure · Platformer · 2D Platformer

Öoo
Shared: Puzzle Platformer · 2D Platformer · Platformer

ANIMAL WELL
Shared: Platformer · Puzzle Platformer · Pixel Graphics

Narita Boy
Shared: Adventure · Platformer · 2D

Katana ZERO
Shared: Platformer · Pixel Graphics · 2D Platformer

Portal 2
Shared: Platformer · Puzzle Platformer · Singleplayer