Jim Power: The Lost Dimension

If he succeeds in defeating us, he will destroy our world, opening a gateway for his kind as well as the strange mutating effect that this dimension has on all organic life forms. His forces are far too strong for us to defeat in a frontal attack which is why we must send you to slip past his Omni-eye scanners and make an assassination attempt on the greatest evil that man has ever known. It will take absolutely all of your wits and skill but it is imperative you reach his fortress and send him back to the sulphurous plane from where he came.