Eskero: The pen and paper RPG system

...more of an example of them losing their humanity slowly while dabbling with the powers of deities.

I personally was probably thinking of it as a more overt thing, so yeah, I can get behind a more "slowly going power-mad, losing human perspective" type thing. Brings to mind the people who focus on the Game over the Role Playing.

...

Actually, if you could... promote that behavior through the mechanics of "mutation," or what have you... that mentality that drives people to min/max and steal everything and exploit the game...

Hrm.