Is under water mandatory?
Hell I hope not lol but theres probably a lot of great loot down there and stuff to prolongue how long you can breath,I think theres even something that lets you breath underwater,cant wait to get that.
Those sidequest scenes are incredible,no more just a single face with barely any motion while you talk to the NPC...Witcher had those also but its even better here...got my butt kicked in the early mmmm
Embassy fight,was not prepared for that lol
EDIT: Just saw Dried's response,well damn,oh well