High Concept

Here's the rough concept for the game.

Battlefield of the Gods is an action RPG centred around a inescapable valley filled with undead creatures.
Players take on the role as the champion of a god of their choice. Gods from several different pantheons (e.g. Greek, Norse, Egyptian, etc.) are available for selection. The class and abilities of a player are determined by the god they choose to serve.
The object of the game is to destroy the undead creatures in order to halt the resurrection of a dark entity of destruction, known only as the Unnamed, sealed in a crevasse at the centre of the valley long ago by the gods.
Players may choose how to play: they may team up; fight individually; or fight against both the undead hordes and each other.
Eventually after a number of waves of monsters have been defeated the Unnamed arises from it's crevasse and players must destroy it's physical form to allow the gods to reseal it.