During G-Biowar I (the first global biowar), a powerful new form of retrovirus was released as a deadly reprisal from the enemy. The viruses unleashed biological forces which couldn't be stopped, leaving the planet filled with new and deadly forms of life.
The game features a 2D side-scrolling shoot 'em up style of gameplay and the character chosen by the player can be moved in 8 directions by the D-Pad. The player can move, shoot, dodge, and block. To block an enemy projectile, the player must place the power star in the path of the projectile. There is also an array of different weapons at the ships' disposal.
You have a choice between four types of ships: They include the bird-like blue and red ship Orestes, the reptile-like red and green ship Electra, the bug-like green ship Hecuba, and the fish-like yellow and purple ship Polyxena. These ships all have organic shells, making them look like actual creatures.
Source: Wikipedia, Biohazard Battle , available under the CC-BY-SA License.