Devilman

Devilman retells the story of the manga of the same name as a side-scrolling beat 'em up game that omits most of the explicit content of Go Nagai's original series. You start playing as Akira at the beginning of the demon infiltration. After finding Ryo in the city, you will gain the central mechanic of the game: transformation. Fighting demons as Akira will build up the rage meter, which enables Akira to transform into Amon. As Amon, you constantly drain the rage meter, gain a projectile attack, hit harder and take less damage.

Throughout the stages in this game, there are human NPCs you can optionally rescue. You need to be in Akira form to talk to them. The number of remaining human NPCs to be rescued are displayed on the top right of the screen and functions as an inverted karma meter. The less human NPCs you leave unrescued, the better ending you get.