After twenty hours of playing, I can say that the game is even better than I expected and the rest will only come after this. From the trailers, it looks like a game based on more closed corridors, but in reality it's more of an open world with nice big open areas that have corridor-like caves. That's a big difference. The other is the fight, which is also much more enjoyable when played than what came out of the videos. The experience of discovery is the best, the game rewards a lot and there are many treasures to find! The characters are great, even the NPCs have detailed believable characters in the side quests, which are very atmospheric. A lot of skills can be developed, almost 100 and each of them has several levels!
Good advice: don't rush through the main mission, play a lot of side missions and research!
The graphics and music are top class.