Kaikan

Blue Wish is a Japanese vertically scrolling bullet hell doujin soft by x.x, released in August 8, 2005 for Windows PC.

Weapon of Choice is a high-energy, side-scroller in which each playable character is unique with their own special weapon and abilities! Blast insane aliens, find new player characters, and choose between branching paths!

Wings Of Bluestar is a 2D horizontal shmup (shoot'em up) that offers singe and local multiplayer. It's sci-fi themed and has an anime art style. The game offers a lot of features to unlock using ingame earned points, these features are like more credits, boss challenge, gallery etc.

It's a twin-stick vertical scrolling Shooter hybrid with a cinematic flare: An unrelenting onslaught of eye-popping visuals, ear bursting soundscapes and mind-melting action makes Cygni the vanguard for the next generation of shoot-em ups.

Hyper Sentinel is a pure shot of pixel-perfect nostalgia, fusing iconic shooter gameplay with contemporary systems and mechanics; repackaging the sights, sounds and feel of the arcade to deliver the ultimate neo-retro experience.

Genetos is a Japanese freeware game by Tatsuya Koyama that explores the history of the Shoot-em-up genre through play.

A vertical-scrolling shoot ’em up spinoff of Earth Defense Force 4.1.

$1 Ride is a casual game with a fast paced, timing and reflex testing game-play style. Travel through space at warp speed! Collect power ups to increase your speed or risk your fuel to collect money, missiles and more.

Drifting Lands is an hybrid of classical horizontal shoot'em'up with a lot of strong gameplay elements coming straight from the hack & slash genre. Though Drifting Lands is still in development you can get a taste of the game via the free demo which is regularly updated!

Darius is a two-dimensional horizontally scrolling shoot 'em up set in a fictional future. Uniquely among shoot 'em ups, the game's screen is three times wider than conventional size, and the arcade cabinet uses an arrangement of three screens to accommodate it. The player controls an ornate fighter spacecraft, named the Silver Hawk, and must navigate through scrolling terrain while battling a variety of fighter craft, ground vehicles, turrets, and other obstacles throughout the game's stages (referred to as zones in the game). The ship's arsenal consists of forward-firing missiles, aerial bombs and a protective force field, all of which can be upgraded by power-ups (in the form of large, colored orbs) that are dropped by specially-colored enemies throughout the game's zones. When the player reaches the end of a zone, a boss appears, which must be defeated to proceed. Once the boss of a zone is destroyed, the player is given a choice of which zone to play next via a branching path. While there are 28 zones in total, only seven can be played in a single run. A Sega Mega Drive port was produced in 2019 that is pre-installed in the Mega Drive Mini as a bonus game.