Games like Natural Allies
Games like Natural Allies include SANABI, Katana ZERO, Blasphemous 2, Celeste, and Shovel Knight: Treasure Trove. We matched them by the tags players give Natural Allies on Steam (Action, Adventure, Platformer, 2D Platformer, and 2D): closest matches first, and among equally close ones the better-known games.

SANABI
Shared: Action · Pixel Graphics · Adventure

Katana ZERO
Shared: Action · Pixel Graphics · Platformer

Blasphemous 2
Shared: Adventure · Fantasy · 2D Platformer

Celeste
Shared: Platformer · Pixel Graphics · 2D Platformer

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

Webbed
Shared: 2D Platformer · Pixel Graphics · Platformer

Skul: The Hero Slayer
Shared: Action · Pixel Graphics · 2D

Dust: An Elysian Tail
Shared: Action · Platformer · Adventure

Pizza Tower
Shared: 2D Platformer · Platformer · Action

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

Owlboy
Shared: Adventure · Platformer · Pixel Graphics

Broforce
Shared: Action · Pixel Graphics · 2D

Sonic Origins
Shared: Action · Adventure · 2D Platformer

Hollow Knight
Shared: Platformer · 2D · Adventure

Dead Cells
Shared: Adventure · 2D · Pixel Graphics

Rogue Legacy
Shared: Platformer · Action · 2D

Gravity Circuit
Shared: Action · Platformer · 2D

BlazBlue Entropy Effect
Shared: Action · 2D · Platformer

Smilemo
Shared: Action · Adventure · Platformer

Out There Somewhere
Shared: Platformer · Adventure · Pixel Graphics

VVVVVV
Shared: Platformer · Pixel Graphics · 2D Platformer

Phoenotopia: Awakening
Shared: Action · Adventure · Platformer

The Messenger
Shared: Platformer · Pixel Graphics · Action

Gato Roboto
Shared: Action · Adventure · Pixel Graphics