I rate it good. I'll go straight to the pros and cons.
+ The open world is truly an open and living world.
+Graphics - on par with modern games.
- The idea of combining robots with Vikings in one bottle is original, but controversial. I would classify it as a minus, because... I think this is a weak move in creating the lore of this game. It should have been more subtle somehow...
Neutral: 1. Combat. Nothing special, nothing bad, nothing new.
2. Plot. There are both pros and cons. I would say the ending is a plus.
3. The idea with a jetpack. Unusual.
Overall, an interesting game, a worthy representative of its genre.