Games like B.I.R.D.
Games like B.I.R.D. include Pizza Tower, SANABI, Katana ZERO, Super Meat Boy, and Broforce. We matched them by the tags players give B.I.R.D. on Steam (Rhythm, 2D Platformer, Platformer, Bullet Hell, and 2.5D): closest matches first, and among equally close ones the better-known games.

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

SANABI
Shared: 2D Platformer · Pixel Graphics · Action

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

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

Broforce
Shared: Pixel Graphics · Action · Platformer

The Messenger
Shared: Platformer · Pixel Graphics · 2D Platformer

Celeste
Shared: Platformer · Pixel Graphics · 2D Platformer

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

Geometry Dash
Shared: Rhythm · Platformer · Colorful

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

Gravity Circuit
Shared: Platformer · Action · 2D Platformer

Rhythm Doctor
Shared: Rhythm · Pixel Graphics · Action

VVVVVV
Shared: Platformer · 2D Platformer · Pixel Graphics

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

Sonic Mania
Shared: Platformer · Pixel Graphics · Colorful

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

Sonic Origins
Shared: 2D Platformer · Action · Platformer

GuGu Pizza : Delivering Pizza to the Space Station? Boss, this is just not right!
Shared: 2D Platformer · Platformer · 2.5D

BIT.TRIP RUNNER
Shared: Rhythm · Platformer · Action

Dungeon Munchies
Shared: Pixel Graphics · Action · Indie

Tribal Hunter
Shared: 2D Platformer · Platformer · Action

Webbed
Shared: 2D Platformer · Pixel Graphics · Platformer

Vampire Survivors
Shared: Bullet Hell · Pixel Graphics · Action

Hi-Fi RUSH
Shared: Rhythm · Action · Platformer