If you beat Cuphead, what happens?

<b>The Beat The Devil at His Own Game</b> achievement can be achieved by Beating Cuphead on Expert mode. On Oct 1, 2017:

Question

The Beat The Devil at His Own Game achievement can be achieved by Beating Cuphead on Expert mode. On Oct 1, 2017:

Hagrid P Hazard · Accepted Answer

The Beat The Devil at His Own Game achievement can be achieved by Beating Cuphead on Expert mode. On Oct 1, 2017: