Horizon Zero Dawn: After the Final Battle

[#1]

What do I do after the final battle? I completed it, but it keeps telling me to do the quest again. One, how do I get it to stop, two, what else is there to do (storyline wise)?

[#2]

You don't get it to stop, it designed like that.

It's a choice that some people dislike, and others are fine with.

I'm fine with it, I can see why they did it. I can see why it confuses others though.

If you haven't finished all the side stuff, there's that, plus the Frozen Wilds expansion is well worth the purchase price.

[#3]

The purpose of the game is to complete it on the harder difficulties to unlock bonus things like face paint and extra outfits, but for that, you need the frozen wilds expansion pack.