The Ninth Sea

It is 1523.

After finding a red orb in a cave, he becomes a player in a game created by God with a boundary that spans most of the world. The boundary slowly becomes smaller and smaller, enclosing the players in until they are closer and closer together. The goal of the game is simple - Kill all other players. The epicenter of the game is the mysterious Ninth Sea, the place of legends where all monsters and magic originate.