Vengeance.

Something happened in the game, on the bounty hunting questline I'm on.
After killing a... very easy target, really, I return back to my employer's house and go inside. And... my employer's not there.

But on the painting there...

The note is from somebody named "The Judge", telling me that someone made "Javier" is going to be with me soon, and that my employer, Randall, is dead. Immediately after I finish reading the note, a man named Javier Sugar enters and tells me that he wants me to join the bounty firm he works for. The one The Judge is a part of. When I ask what happened to Randall, he tells me that he's dead.
Naturally I tell him to go fuck himself.
What follows is a firefight of epic proportions. He uses a rifle that does massive damage each time it hits and has a chance of knocking me down. Me? I take out my usual close-quarters weapon, a combat shotgun. I finally win and loot him, finding a key to the safe on the wall.
Inside is a note from Randall, saying that he's probably dead. He says that I'm the best damn bounty hunter he's ever had, and tells me that he doesn't care if I avenge his death or not. He just wants me to take vengeance on the man who killed his family. Also inside the safe is a revolver called "Sweet Revenge".
You got it Randall. I'll fulfil your last wish, boss. But first...

I need supplies.