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 Mega Drive/Genesis and for the Sega Mega Play arcade platform.

The viruses unleashed biological forces which couldn't be stopped, leaving the planet filled with new and deadly forms of life.

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.

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.

Extra lives are attainable by absorbing 1-UP icons in the various stages, or reaching milestones for accumulating points without getting Game Over.

The game also features strong usage of deep, bass-heavy music tracks, creative and colorful artwork and foreground and background elements.