Game length side missions


I have managed to find a few things on main length. That is is 15-20 hour, however wanted to see if this is only for the main story or I there are additional side quests?

Also how heavy are the rpg elements in this?

Customization wise


You can do the entierty of the game sidequests and main story in about 12 hours on normal, I would guess that it will take around 20 on very hard.

The RPG elements are not that super heavy but they are there