Kingdom Hearts: Force of Destiny.

Kingodom hearts forces of destiny is an open ended kingdom hearts game in whitch you choose you characters path, you can become a hero of light or a warriour of darkness and everything in between. all the different paths have their on rewards and challenge

The path of darkness.
Turning to the darkness has multiple assets and challenges such as﻿,

Allies
Sephiroth(late in the game)