You need to have the Black and White installed in order to play this expansion pack.
Battle of the Gods is a straight-forward expansion pack for Black & White 2. Like every other expansion pack, it features new levels to play on, abilities to mess around with and unit/building types to use. The storyline of Battle of the Gods picks up a little after Black & White 2. Another god has risen up to oppose the player and hopes to use his army of undead soldiers to sway the masses into following him. The goal for Battle of the Gods is, of course, to crush the opposition and build a civilization under your influence. The choices are still open to the players to make; good or evil, peace or use of military, conquer or use of diplomacy. The choices are all available to the players like expected.