Gronbek, yes open world and yes lots to do.
Visit a tailor, bath house, butcher, lodging, baker and browse the goods.
Steal a horse. (Different horses have different stats)
Enjoy the rain and 24 hour cycle.
Equip and layer armour for protection or style.
Practice archery.
Hunt wild animals and sell the meat.
Steal if you can get away with it and sell the goods far away because people nearby will recognise them.
Every action increases skills somewhat too..
Picking up flowers etc increases Herbalism EXP.
Kills with a bow increases archery EXP.
Thats the levelling system.
Clothes and armour get bloody, dirty and torn which effects peoples views on you. But if you smell enough you cannot sneak as well lol... because youre stinky. Very very in depth.
So so much going on in this.