Games like Highway to the Moon
Games like Highway to the Moon include Cyberhunt, Nex Machina, Beat Hazard, RUINER, and UBERMOSH:WRAITH. We matched them by the tags players give Highway to the Moon on Steam (Action, Indie, Shoot 'Em Up, and Twin Stick Shooter): closest matches first, and among equally close ones the better-known games.

Cyberhunt
Shared: Action · Indie · Shoot 'Em Up

Nex Machina
Shared: Action · Twin Stick Shooter · Indie

Beat Hazard
Shared: Twin Stick Shooter · Shoot 'Em Up · Indie

RUINER
Shared: Action · Indie · Twin Stick Shooter

UBERMOSH:WRAITH
Shared: Action · Indie · Twin Stick Shooter

Juicy Realm
Shared: Action · Indie · Twin Stick Shooter

Skul: The Hero Slayer
Shared: Action · Indie

The Hong Kong Massacre
Shared: Action · Indie · Twin Stick Shooter

SYNTHETIK: Legion Rising
Shared: Indie · Action · Twin Stick Shooter

Windowkill
Shared: Action · Indie · Twin Stick Shooter

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

ZeroRanger
Shared: Indie · Shoot 'Em Up · Action

ARMORED KITTEN
Shared: Action · Shoot 'Em Up · Indie

Ultratron
Shared: Action · Indie · Twin Stick Shooter

Hotline Miami
Shared: Action · Indie

LUFTRAUSERS
Shared: Indie · Action · Shoot 'Em Up

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

Hades
Shared: Indie · Action

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

Dead Estate
Shared: Twin Stick Shooter · Shoot 'Em Up · Action

Star of Providence
Shared: Shoot 'Em Up · Indie · Action

My Friend Pedro
Shared: Action · Indie

Nation Red
Shared: Action · Indie · Twin Stick Shooter

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