I've done quite a bit of work on this today, and I think a new thread devoted to these updates is warranted at this point.
The Adventure Selection screens can be found on the Battlegrounds site, right beneath the overworld: https://akbattlegrounds.net
They are categorized by setting, one for each setting. All of the settings are currently locked except Pathfinder, where the three groups currently are.
Unfortunately, in the first draft of these screens, I included a lot of spoilers in the adventure descriptions, primarily to show people how cool the content is, so they would sign up. Now that they have signed up, and we've started playing, I really need to get rid of the spoilers, and I've just done this for the three currently selected campaigns: Rise of the Runelords, Curse of the Crimson Throne, and War for the Crown. All of them feature only an intriguing one-sentence description now, and that's it.
In addition, I've been working on my extremely complex unlocking mechanics, that you won't find in any other D&D edition or DM world. This is basically a Civ-style tech tree via which all of the thousands of D&D products will be related to each other for unlocking purposes. Now understand that we're talking about HUNDREDS OF THOUSANDS of pages. So there's just no way I can produce this tree right from the start. No one else alive can either, and I am certainly the best person for this job. So this aspect of the UE and Battlegrounds will remain a work in progress forever, and we'll also have to unlock or relock stuff after the fact, on occasion, to account for new information as I discover it.
That said, at least as far as the Varisia and Taldor regions are concerned, where the current three campaigns are taking place, I've made quite a bit of progress recently, and especially today. So you'll find lots of new material has been added for unlocking in those regions (such as the Harrow Deck accessory in Curse of the Crimson Throne, which has in fact already been unlocked and it's the first unlocking done on Battlegrounds), and also some material has been removed (most notably the campaign Return of the Runelords, which it turns out has another campaign or two as prerequisite(s), and will therefore only reappear once/if those have been cleared).
So here's what the three current campaign unlockables look like right now:
Another little detail is the ACTIVE status I've put in each campaign, with the respective group's name.
Now I am trying to figure out what is the best way to PRESENT the stuff that's ALREADY been unlocked, i.e. the Harrow Deck for the time being (and also the default unlocks of the PF Core Rulebook and the Gazetteer). Do I simply post this stuff in the group threads, or make a new thread, or what? I'll figure this out soon.
Please note that lots of spoilers remain in the Adventure Selection screens in all the other selectable adventures and campaigns, so don't click on them any more. Let them fade from your memory, and eventually I will sanitize everything and it'll be safe for you to click around again. For the time being I've done so for the current three campaigns, and you're certainly welcome to click on those as much as you want. I'll keep you posted in this thread when I add (or remove) unlockables from them.