Phantasy Star Online Episode III: C.A.R.D. Revolution

A potent photon-like chemical was discovered on Planet Ragol, which sparked a fierce conflict between a rebel team known as the Arkz and a group of bounty hunters known as the Hunters. The valued substance known as “The Germ” possesses extraordinary replication capabilities and can be contained in packets around the size of playing cards. Warriors who enter combat carrying a deck, including the coveted cards, can bring many lethal weapons and creatures into the fray. Fight with the Hero Hunters or on the Dark Side of the rebels, and construct your decks by the side you want to support. You will build various potent decks with over 500 cards, each featuring an alien PSO creature, weapon, or fighting technique.