Blue Heaven is an adults-only action-RPG mixed with Hack & Slash that tells a bloody story from the perspective of an asocial and nihilist mercenary who works enforcing the law in a decadent futuristic cyberpunk universe where good and evil are almost indistinguishable and dirty sex, deadly drugs and decomposing corpses are easy to find in the dark alleys of every metropolis. Soon he will have to leave his world behind and explore unknown lands to save by force of sword the last bit of humanity he has left, finding himself involved in a conflict of unforeseeable magnitudes.