Bio-Hazard Battle 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.
The player will begin with a pre-set number of lives, from 1 to 5, 3 being the default. When a player is hit by a hostile creature or environment, their ship is destroyed and will reappear with one less life. Extra lives are attainable by absorbing 1-UP icons in the various stages, or reaching milestones for accumulating points without getting Game Over. 20,000, 50,000 and 100,000 points are the first three.
Bio-Hazard Battle also features strong usage of deep, bass-heavy music tracks, creative and colorful artwork and foreground and background elements. Despite the many obstacles in the scenery and landscape, the player cannot be harmed or die by bumping into anything other than an enemy or enemy fire. Players can, however, die by being crushed between the screen’s edge and a wall. Scrolling and enemy movement is extremely fast in comparison to other games of its time. The player travels through eight levels, each one increasing in difficulty, with the last three only being available on the harder difficulties.
At the ship selection screen, highlight the ship in the upper left-hand corner and press A + B + Start. You will begin as the all powerfull Dragon-bio 5.
At the level select screen, move the cursor to the last level and press A + B + C + Left. When the screen fades, press A + B + C + Left again. The display will register 5 lives, but they’ll never decrease.
Turn on the game. When the Sega logo hold C. When the title screen appears, make a full clockwise circular motion with the D-pad, starting and ending in the Up position. You should hear a noise if the cheat worked. Release C and press Start to choose your level.
Play As The Same Ship
At the main menu, highlight the 2 PLAYER option, then hold Right and press Start. Don’t release RIGHT until the ship selection screen appears. If your timing was right, both players will have the upper-right ship selected.
In the caves just past the guys that look like lips, go up to the upper left-hand corner. You will die and begin in a new level in a giant asteroid field. When you finish the level, you will return to level 4, the caves.