What are the different endings for the game UnEpic?

I heard that UnEpic has multiple endings. I am curious about how the story ends. Could someone please outline whatever ending story you have seen so far?

I have put in a lot of hours but cannot continue playing anymore for the reasons outlined here.

From multiple sites I have found the following:

From Steam chat room, and Video Game Geek site:

There are 3 chests in the last area of which you can only open one. Depending on what chest you chose the ending will differ.

This means that there are a possible 3 endings. According to VideoGeek it seems that all 3 endings a poorly constructed and your character dies 100% of the time.

There are three final bosses. Each boss correlates to a certain chest. Each on represents the "demon in the player" and you will die. Then the game resets. There is no way to beat UnEpic. Only a way to finish it.

The third ending which you can't find can be found in this video:UnEpic ending 3.

There are three youtube videos with the three different endings:

Eternal slavery (chest on the right):

Horrible Death (chest on the left):

Eternal agony (chest in the middle):