Games like Critical Annihilation
Games like Critical Annihilation include Hotline Miami, Teardown, The Void Rains Upon Her Heart, Hades, and Savant - Ascent. We matched them by the tags players give Critical Annihilation on Steam (Action, Indie, Early Access, Shoot 'Em Up, and Voxel): closest matches first, and among equally close ones the better-known games.

Hotline Miami
Shared: Action · Indie · Great Soundtrack

Teardown
Shared: Destruction · Voxel · Indie

The Void Rains Upon Her Heart
Shared: Indie · Action · Shoot 'Em Up

Hades
Shared: Indie · Action · Great Soundtrack

Savant - Ascent
Shared: Action · Indie · Shoot 'Em Up

Bastion
Shared: Indie · Action · Great Soundtrack

Katana ZERO
Shared: Action · Great Soundtrack · Indie

ZeroRanger
Shared: Indie · Shoot 'Em Up · Action

Storm Chasers
Shared: Early Access · Indie · Action

My Friend Pedro
Shared: Action · Indie · Great Soundtrack

Touhou Fuujinroku ~ Mountain of Faith.
Shared: Action · Indie · Shoot 'Em Up

LUFTRAUSERS
Shared: Indie · Action · Shoot 'Em Up

Jets'n'Guns 2
Shared: Action · Indie · Shoot 'Em Up

Dead Bits
Shared: Action · Indie · Great Soundtrack

Wreckfest
Shared: Destruction · Action · Indie

Star Saviors
Shared: Action · Shoot 'Em Up · Indie

Hotline Miami 2: Wrong Number
Shared: Action · Great Soundtrack · Indie

Shooty Skies
Shared: Action · Indie · Shoot 'Em Up

Pizza Tower
Shared: Indie · Great Soundtrack · Action

Hard Bullet
Shared: Action · Indie · Early Access

TouHou Makuka Sai ~ Fantastic Danmaku Festival Part II
Shared: Indie · Shoot 'Em Up · Action

Seen
Shared: Indie · Action · Great Soundtrack

Jet Lancer
Shared: Action · Indie · Shoot 'Em Up

Touhou Koumakyou: New Classic - the Embodiment of Scarlet Devil
Shared: Shoot 'Em Up · Action · Indie