How are they obtained and what are the alternative endings of Call of Juarez Gunslinger

Call of Juarez Gunslinger: here are the alternative endings [360-PS3-PC]

 

Revenge or forgiveness, that's the problem.

In its small way also Call of Juarez Gunslinger for Xbox 360, Playstation 3 and PC offers the gamer two alternative endings. No hidden system that spies on your behavior during the campaign will determine which of the two endings you will see: in Call of Juarez Gunslinger the choice is yours and yours alone.

How are they obtained and what are the alternative endings of Call of Juarez Gunslinger

ATTENTION! SPOILER

At the end of the game you will be placed in front of the choice of killing Bob in a duel or saving his life: in the first case you will get the "Vendetta" ending (which should be the bad one), with the second choice you will have the "Redemption" ending, that is improve.

Here is a video (in English) showing the two endings.