Caladrius AC2013

A vertical scrolling shooter/shmup released only in Japan. It's notable for using the DMG Game Boy's passive-matrix image retention (ghosting) to simulate transparency and multiple layers of parallax.

In this vertical scrolling spaceship shooter, you control a ship that can change its polarity at will. As blue/white, the ship can easily destroy red/black enemies, and vice versa. Bullets of your polarity can be collected to fuel your energy gauge, but those opposite will kill you. Destroying an enemy ship causes them to fire revenge bullets which can be absorbed and fired back by the player. Different difficulties exist to change exactly how you interact with polarized points, or how they appear. It is the spiritual successor to Radiant Silvergun, featuring similar level and boss design, as well as it's buddhism inspired themes and aesthetics. Both are directed by Hiroshi Iuchi, who also composed Ikaruga's soundtrack.

Gradius Collection is a compilation of five beloved games in the Gradius series available for the first time on the PSP system. Spanning more than 20 years, the five games--Gradius, Gradius II, Gradius III, Gradius IV, and the long-awaited Gradius Gaiden--deliver hours of classic 2-D shooting action on the go.

R-Type Delta is a horizontally scrolling shooter video game released only on the PlayStation. It is the fourth game in the R-Type series (hence Delta, the fourth letter of the Greek alphabet) and also the first game in the R-Type series rendered in full 3D graphics.

Ever wanted to play a game where you don't have to waste even one second on the tutorial? Where the only thing you have to do is destroy aliens, rake in cash, flirt with the shopkeeper and upgrade your ship to destroy even more aliens? Then A Space Shooter for 2 bucks! is the game for you! Plus, it's only 2 Bucks! That's like, the best deal EVER! -Destroy ten different kinds of alien ships across sixteen different levels -Annihilate five alien generals and steal their unique weapons -Make money to upgrade your ship, then kill more aliens -Enjoy ten different types of power-ups -Enjoy philosophical banter with your ship's trusty AI Edgar IV. Nahh just kidding! Embark on an epic journey across the stars to destroy X, the Supreme Alien God Emperor, and bring peace to the universe. Bah! Who're you kidding? You're doing this 'cause you get a tremendous kick out of blowing alien scum to smithereens!

DonPachi is a 1995 vertical manic shoot-'em-up originally in arcades and was the first game from the developer Cave. Settings are mainly woodland and enemies are military vehicles and robots, culminating in the final boss, a huge robotic bee. One of three weapon configurations is chosen at start and then leveled up through dropped power-ups. DonPachi was ported to the Sega Saturn and Sony Playstation in 1996.

Your planet has been overrun by the meanest mutant vegetation ever created in a genetics laboratory. It's taken over buildings, labs, fighter craft... even people! And it's getting bigger... and meaner... with each passing second. But it hasn't taken over you. Now, you're going in on a mission to deliver a POWER STRIKE! You have a special attack ship with the ability to use weapons you free from the ground. The action is hot and heavy. The enemy is coming faster than you could ever believe! So fight hard and fast. If you don't turn the mutated vegetation into a giant tossed salad, they'll turn you into toast!

Silkworm is a classic horizontally-scrolling shoot-em-up. The main difference between this game and many other side-scrolling shoot-em-ups is that you will be on land as well as in the air. The first player would play as a helicopter, but if a second player joins the game, they would play as a jeep. Both players would have to protect each other as well as themselves. After a certain number of kills, a "goose" helicopter would form on the screen. If the players managed to destroy it they would get a weapon's powerup. This would go on throughout the entire game, and a "goose" could appear even during the fight with the end-of-level baddie.