Games like Starry Nights : Helix
Games like Starry Nights : Helix include Planes, Bullets and Vodka, Bit Blaster XL, TouHou Makuka Sai ~ Fantastic Danmaku Festival, TouHou Makuka Sai ~ Fantastic Danmaku Festival Part II, and Revolution Ace. We matched them by the tags players give Starry Nights : Helix on Steam (Indie, Action, Casual, Bullet Hell, and Shoot 'Em Up): closest matches first, and among equally close ones the better-known games.

Planes, Bullets and Vodka
Shared: Action · Casual · Shoot 'Em Up

Bit Blaster XL
Shared: Bullet Hell · Shoot 'Em Up · Shooter

TouHou Makuka Sai ~ Fantastic Danmaku Festival
Shared: Indie · Action · Bullet Hell

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

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

Vampire Survivors
Shared: Bullet Hell · Indie · Casual

LUFTRAUSERS
Shared: Indie · Action · Bullet Hell

RADical ROACH Remastered
Shared: Indie · Action · Casual

Chicken Invaders 5
Shared: Action · Indie · Casual

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

Touhou Kouryudou ~ Unconnected Marketeers.
Shared: Action · Bullet Hell · Shoot 'Em Up

DRAINUS
Shared: Action · Indie · Shoot 'Em Up

Chicken Invaders 4
Shared: Indie · Action · Casual

Cyberhunt
Shared: Indie · Action · Casual

ZeroRanger
Shared: Indie · Shoot 'Em Up · Bullet Hell

Gun Wings
Shared: Action · Bullet Hell · Indie

Symphony
Shared: Indie · Action · Shoot 'Em Up

BLUE REVOLVER
Shared: Indie · Action · Bullet Hell

Shikhondo(食魂徒) - Soul Eater
Shared: Indie · Action · Bullet Hell

Touhou Juuouen 〜 Unfinished Dream of All Living Ghost.
Shared: Action · Bullet Hell · Shoot 'Em Up

Nova Drift
Shared: Bullet Hell · Shoot 'Em Up · Shooter

Beat Hazard
Shared: Bullet Hell · Shoot 'Em Up · Indie

Touhou Fuujinroku ~ Mountain of Faith.
Shared: Indie · Action · Bullet Hell

Mirage Feathers
Shared: Bullet Hell · Anime · Shoot 'Em Up