From the website:
You’re one of the Great Old Ones – beings of ancient and eldritch power. Cosmic forces have held you at bay for untold aeons, but at last the stars are right and your maniacal cult has called you to this benighted place. Once you regain your full powers, you will unleash your Doom upon the world!
There’s only one problem: You’re not alone. The other Great Old Ones are here as well, and your rivals are determined to steal your cultists and snatch victory from your flabby claws! It’s a race to the ultimate finish as you crush houses, smash holes in reality, and fight to call down The Doom That Came To Atlantic City!