Underwater Attack

The water is no longer calm. The undersea world has undergone a transformation from tranquil environment to a place of unspeakable violence, graphic murder and horrific danger.

A prediction is that before human civilization, there was once an advanced civilization on Mars. A sorceress destroyed the civilization and everything that was remembered of it, except a chip called "INFINITY". In 2100, millions of people were starving due to massive food shortages and has caused civil wars around the world. Centuries later, however, the world government had sent colonists to Mars which began to solve these problems. At a nearby farm, the Infinity chip was discovered and it revealed all the technology of the advanced civilization. In 2309, a Declaration of Independence has been sent to Earth. Large armies have been amassed on Mars, and a gigantic armada was waiting for any attack from Earth. The Earth government sends out a fleet of battleships followed by a special air raid unit called ACID; ACID is equipped with a new fighter ship known as the Mosquito. Their mission is to enter Mars, stop the rebel violence, locate and destroy the rebel leader, whoever... or whatever it may be...

Ketsui: Kizuna Jigoku-tachi is a vertical bullet hell shoot 'em up developed by Cave and released in 2003.

Crimzon Clover: World Ignition is a fast-paced, top-down bullet-hell shooter where players command one of three unique ships through relentless waves of enemy fire. The game expands on the original with multiple play modes: Boost (adaptive difficulty), Original (classic arcade-style), Unlimited (brutal bullet chaos), and Time Attack (speedrun challenge), plus a Novice setting for beginners. Core to the experience is the Break Meter, which fuels powerful bombs and temporary power-ups: Break Mode amplifies firepower, while a full meter unleashes the devastating Double Break Mode, turning the tide against even the toughest bosses. A robust Training mode lets players customize scenarios to hone their skills. With vibrant visuals, precise controls, and escalating intensity, World Ignition delivers a thrilling test of reflexes and strategy

In the Hunt is a horizontal scrolling shooter arcade game by Irem. It was released in 1993 and later ported to the Sega Saturn, the PlayStation and Windows 95 for the PC by Kokopeli.

A quarter-century after the arcade hit Raiden first left its mark on the shooting genre, the series now comes to the Xbox One in its most modern and advanced form yet! Join the war for Earth's future, where the tide of battle holds constant surprises, in this game that's easy to learn, but difficult to master. Using Xbox One cloud functionality to its fullest, now all players can easily access their data, allowing you and your comrades-in-arms to enter the fray side-by-side!

Baryon is a straightforward vertical shooter which features a smooth graphical engine, a short digital sound track and various types of enemies. There are two types of ships, each with its own weapon types, as well as missile upgrades (homing as well as regular, more powerful ones), bombs and shield.

Battle Garegga is a vertically scrolling shoot'em up arcade game. The storyline takes place in a sort of diesel punk versions of the 1940s. Main heroes are brothers Brian and Jason — the sons of genius designer who want to destroy the evil Federation. Players control planes (4 air crafts to choose), fly forward, collect items and shoot to enemies. Unlike in most other scrolling shooter games, where bullets are brightly colored to distinguish from the background, bullets are realistically colored, making it difficult for players to see them. As a bonus, by entering a code, you can unlock four of the characters from Mahou Daisakusen.

Psyvariar Delta is a classic shooter known for the Buzz System, where players level up by grazing enemy fire and chaining Buzz. Also included in this version are 2 HD remakes of the arcade classic Psyvariar Medium Unit and Psyvariar Revision with new additional features.

Blast hordes of alien ships into junk. Collect the scrap to upgrade your ship into an unstoppable force of destruction. Unlock new characters and weapons and upgrade your stats between runs.