Satanic Archtype

4 vs. Satan:
*Satan himself, obviously.
Alex in Princess Quest:
*Malthor van Dracula, being the superior to demon is pretty much this.
The Stone of Power:
*NONE
The Three Kingdoms
*Degares, the Demon King. He's even the one behind the actions of Vlados Palerius.
Dragondawn
*NONE
Harter Knall
*NONE
Hero Story
*Shevu, he's the master of demons, thus pretty much their devil.
Kill the Demons
*Casper and Rustoc are basically demon-gods thus they're the games' equivalent of one.
Satan Saga
*Satan himself, again.
Story of Hero:
*Played with one of the Grimoires. It has forbidden spells, can turn into a red demon and wants to burn their entire world. Yep, it's the setting close equivalent to Satan.
The Legend of Devils
*Satan himself.
The Sidestory Duology:
*NONE
The Time Of Bloody Fear:
*Moses, the leader of demons, might be one, though he doesn't fit any criteria other than being a demon king.
*Malthor himself, who some describe as some kind of devil and even the demons worship him. But similar to above, other than being one of the most evil he doesn't fit any criteria. Plus, he's a human, even if a very powerful one!