Let The Battle Begin.
This is your chance to battle the diabolical Joker for the freedom of Gotham City.
Incredibly strong and armed to the teeth with a vengeance, Batman is prepared to put his life on the line to seek out The Joker and put an end to his evil reign of terror.
But it will not be easy. With the help of the Batmobile, Batwing, and you, Batman will face an army of deadly enemies as he leaps, flies, and dodges their fire on his way to The Joker's hideaway.
Prepare yourself for thrilling excitement, action-packed adventure, and awesome power. The Joker awaits you!
--from the back cover of Batman for Genesis