Galactic Assault Squad

Somewhere between heaven and the underworld--in the center of a quiet lake--stood an ancient castle known as Aventheim. One night, without warning, denizens of the netherworld emerged and slaughtered the kingdom; nary a soul was left alive. Within an abandoned, long-forgotten church deep in the woods, a wisp is set free. Bereft of memory, it is drawn toward a monster-infested castle and re-awakens the souls of vanquished knights, leading them back towards the fallen stronghold to confront the very forces of evil that took their lives.

A vertical bullet hell shmup based on Alice in Wonderland for DSiWare.

KYM-tan Shoots Things is a shooter game, based on the website personification of the internet humor site KnowYourMeme.

Bullet-hell shooter

Indie bullet hell/STG game developed by Ichigo-Citron, based on the anime/manga series Rozen Maiden.

It's a Twitch Chat integrated Bullet Hell Game, where the Streamer Plays against the Chat. Periodically the Game will Request Patterns from the Chat to be Queued up in the Next waves of Patterns thrown against the Streamer. 2 Hits, and you're out!

Yume Nikki Nijisousaku STG is a vertical-scrolling shooter/bullet-hell style Yume Nikki fangame. You control Madotsuki from the original game as she fights her way through the White Desert.

Descend the nether in search of Death himself! Choose from God-given powers to slay his hordes of minions. Unlock new heroes, collect powerful items and create game-breaking synergies in this roguelite hack and slash survivors game.

One little egg vs an army of zombie chickens! Get to the chopper or you're clucked. A free-range frenzy of arcade action from the yolked-up eggheads behind Shell Shockers.

Galactic Blasters D2 - Brilliant Supernova is the fifth entry in the horizontal space shooter game series Galactic Blasters.