Bio-Hazard Battle
During the first global biowar, a powerful retrovirus filled the planet Avaron with new and deadly forms of life. Only a few survivors remain in O.P. Odysseus, an orbiting platform circling Avaron. Hundreds of years after the biowar, conditions on Avaron are still hostile but livable.
SCREENSHOTS
PHYSICAL
HISTORY
Bio-Hazard Battle, released in Japan as Crying: Aseimei Sensou (クライング 亜生命戦争, Crying: Sublife War), is a 1992 scrolling shooter released for the Sega Genesis and Sega Mega Play arcade platform. It was made available on the Wii's Virtual Console in February 2007. The game was also re-released on the Steam platform in October 2010. An unreleased X68000 version exists currently under ownership of M2 CEO Naoki Horii.
Plot
During the first global biowar on the planet Avaron, a 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.
Only a few survivors remain in suspended animation in O.P. Odysseus, an orbiting platform circling Avaron. The space station's purpose is to keep the surviving humans alive until Avaron is habitable again. The crew of the Odysseus, along with four organic ships known as the "Biowarriors", have been frozen in cryogenic tanks for hundreds of years, and now the onboard computer has awakened them.
Computer probes show that conditions on Avaron are hostile, but livable. The Biowarriors are sent to Avaron to scout areas which the probes have designated least hostile, ascertaining planetary conditions and, ultimately finding a new home for the remaining survivors. The game ends showing all four characters flying back into the mothership.
Gameplay
The game is a 2D horizontally scrolling shooter. 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. Four different craft are available and each has different weapons. Their flight speeds also vary.
The player begins 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.
The game 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 higher difficulties.
Reception
References
STORY
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.
Only a few survivors remain in suspended animation in O.P. Odysseus, an orbiting platform circling Avalon. The space station's purpose is to keep the surviving humans alive until Avalon is habitable again. The crew of the Odysseus have been frozen in cryogenic tanks for hundreds of years, and now the onboard computer has awakened them.
Computer probes show that conditions on Avalon are hostile but livable. The question is; where can the crew of Odysseus set up a colony? The gameplay involves piloting an organic ship to Avalon, flying over areas which the probes have designated least hostile, ascertaining planetary conditions and, ultimately finding a new home for the remaining survivors.
1CC RUNS
One-credit clears we point to as the benchmark for this game.
GAMEPLAY VIDEO
STORES
Prices are cached from each storefront and may be out of date. Last checked 24 Sept 2026. We checked Steam and found no way to buy it there right now.
PRICE HISTORY
Every price change we know of, per shop. Flat means the price held; PC shops reach back through IsThereAnyDeal's archive, console shops start when this site started watching.
Fanatical low: $1.49 (18 Mar 2018) , Steam low: $0.74 (23 Jun 2016)
SCORES
ACHIEVEMENTS 1 set
Tracked by RetroAchievements and earned in an emulator that reports to it. A game tracked on more than one machine gets a set for each, because they are different lists earned on different hardware.
