Earth, Gates and Hunters

150 years ago during the rise of western nations gates suddenly began to appear across the globe. These gates lead to dimensional fragments with all matter of monsters and materials that change the face of the world. To combat the danger presented by the gates humanity is given the power of 'The Hunter System' by a powerful being known simply as "Aeon". With the power of The Hunter System humans were granted the ability to develop three types of paths which grow along with a class they gain at 16. The three paths are; Aura - a physical power type, Focus - a skill precision power type, and Mana - a magical power type. Earth develops mostly the same except their are parts of the world controlled by monsters from Gate Breaks.