Phantasy Star Online Episode III: C.A.R.D. Revolution (ファンタシースターオンライン エピソード３ カードレボリューション) is the third episode in the Phantasy Star Online series. It was released exclusively on the Nintendo GameCube.
Episode III takes place twenty-one years after Episodes I and II. Pioneer 2 is still orbiting Ragol, its people still not yet allowed to come down to their new home. A group of Hunters and other citizens have become dissatisfied with the actions of the Principal Government, which they have come to see as corrupt. They have fled down to the planet's surface, and formed the Arkz, an Eco-terrorist-like group that seeks to expose the government's corruption, and keep them from overdeveloping the planet for their own gain.