Games like Keatz: The Lonely Bird
Games like Keatz: The Lonely Bird include SANABI, Shovel Knight: Treasure Trove, Hollow Knight, Celeste, and Bloodstained: Curse of the Moon. We matched them by the tags players give Keatz: The Lonely Bird on Steam (Platformer, Retro, Action, Story Rich, and Side Scroller): closest matches first, and among equally close ones the better-known games.

SANABI
Shared: Action · Story Rich · Pixel Graphics

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

Hollow Knight
Shared: Platformer · 2D · Difficult

Celeste
Shared: Platformer · Pixel Graphics · Difficult

Bloodstained: Curse of the Moon
Shared: Action · Retro · Platformer

Katana ZERO
Shared: Action · Platformer · Story Rich

Skul: The Hero Slayer
Shared: Action · Platformer · Pixel Graphics

Sonic Mania
Shared: Platformer · Retro · 2D

Broforce
Shared: Action · Platformer · Pixel Graphics

Hollow Knight: Silksong
Shared: Platformer · Difficult · Singleplayer

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

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

Angry Video Game Nerd Adventures
Shared: Platformer · Action · Retro

The Messenger
Shared: Platformer · Retro · Action

Rogue Legacy 2
Shared: Platformer · Action · Adventure

Super Meat Boy
Shared: Platformer · Difficult · Retro

Jump King
Shared: Platformer · Adventure · Action

Dungeon Munchies
Shared: Action · Adventure · Pixel Graphics

Volgarr the Viking
Shared: Platformer · Action · Retro

Gato Roboto
Shared: Action · Platformer · Adventure

Out There Somewhere
Shared: Platformer · Retro · Adventure

Rogue Legacy
Shared: Platformer · Action · Singleplayer

Freedom Planet
Shared: Platformer · Action · Retro

UFO 50
Shared: Retro · Action · Pixel Graphics