There are 3 different endings, based on choices you make in the endgame. It's up to you to decide which is the "correct" one, but I know which one I preferred, even if it perhaps imperilled the world.

Daemonica isn't perfect but it certainly made me want to play, which is a lot of what you want from a game. Its dark side appealed to mine, and for me, its strengths overpowered its flaws. Its final rating might not be the same as yours (isn't that always the case) but reflects how much fun I had over a few very lengthy and absorbing playing sessions.