Batman The Movie is a platform game for the Spectrum, among other systems, published by Ocean in 1989.
Gotham City is plagued by unsavory criminals, but it relies on the dark, winged superhero Batman to deliver justice. In an assault on the Axis chemical factory, Batman appears to take out mobster Jack Napier, throwing him into a vat of acid.
But Napier survives the accident, disfigured and mentally unbalanced, and emerges with a new identity: the Joker. He becomes the master of crime and plans to deal the final blow to the city, releasing toxic gas at a massive tribute party. Only Batman can stop him once and for all.