This is a shooter action game set in a world ravaged by a mysterious virus outbreak. Humans infected by the virus mutate into deadly creatures. Players can choose to fight as humans—using firearms and explosives to eliminate the mutants—or take control of the mutants themselves, hunting down and infecting surviving humans.

This game has two modes：

In survival mode, players randomly choose to join the human and mutant factions and engage in intense battles.

In chase mode, players take on the role of humans and complete challenging tasks according to instructions.