Games like Amaranthine
Games like Amaranthine include My Friend Pedro, Star Saviors, Hotline Miami, ZeroRanger, and Jets'n'Guns Gold. We matched them by the tags players give Amaranthine on Steam (Action, Indie, Shoot 'Em Up, Space, and Shooter): closest matches first, and among equally close ones the better-known games.

My Friend Pedro
Shared: Action · Indie · Shooter

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

Hotline Miami
Shared: Action · Indie · Great Soundtrack

ZeroRanger
Shared: Indie · Shoot 'Em Up · Action

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

HELLDIVERS™ 2
Shared: Action · Shooter · Space

Ikaruga
Shared: Shoot 'Em Up · Action · Great Soundtrack

LUFTRAUSERS
Shared: Indie · Action · Shoot 'Em Up

Bean Battles
Shared: Action · Indie · Shooter

STAR WARS™ Battlefront II (Classic, 2005)
Shared: Action · Shooter · Space

Touhou Kouryudou ~ Unconnected Marketeers.
Shared: Action · Shoot 'Em Up · Great Soundtrack

EVERSPACE™
Shared: Action · Space · Indie

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

The Mean Greens - Plastic Warfare
Shared: Action · Indie · Shooter

KovaaK's
Shared: Action · Indie · Shooter

DOOM
Shared: Action · Great Soundtrack · Shooter

Revolution Ace
Shared: Action · Shoot 'Em Up · Indie

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

Ring Runner: Flight of the Sages
Shared: Action · Indie · Space

Chorus
Shared: Action · Indie · Space

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

Hades
Shared: Indie · Action · Great Soundtrack

Zombotron
Shared: Action · Indie · Shooter

Bastion
Shared: Indie · Action · Great Soundtrack