Alexim: I have tried to test them in many ways and have never been able to get any of the listed items or characters. It would be better for someone to test them independently, but I don't know anyone who has all the DLC, let me know in case.
Ice_Mage: It took me a long time to get back to you, but I am now absolutely livid to report that it's not something on your end. Yes, the DLC items get installed but they're not available in-game.
It may have something to do with the game's bizarre version progression, which goes from 2.60.
82 on 2018-12-11 to 2.60.
22 a week later. Someone more adventurous than me can check if "downgrading" to the higher version fixes anything.
As for the achievement tied to the leaderboards, I don't know if I'll ever have anything to say about it. As I mentioned in private, the leaderboards in The Banner Saga 2 don't work for me (they're blank), but you said they do work for you. So I probably won't ever be able to test that, because I expect support to be completely useless.
And lastly, the good news: it's possible to get the missing items, heroic titles, and new hero. I posted a
guide in the Banner Saga series forum. The last point in the guide details how to easily check if stuff is missing. Most of it can be done right after the intro.
Thanks for the confirmation, as I said I contacted all possible channels but both GOG and the developers never did anything in the end, basically at the moment they sell, at least in part, things that don't exist.
Thank you very much instead for the guide, really clear and very useful.