The Humble Crusader Kings II Bundle seems like an amazing deal for strategy game fans

Definitely worth it. 15 bucks for a whole game is usually not a deal you get for Paradox games :P
Only DLCs missing are:
Europa Universalis IV Converter (converting your CK2 game to EU4)
Ruler Designer (create your own ruler at the start of the game)
Customization Pack (change your current rulers looks)
Also a bunch of cosmetic/music DLCs

I haven't played Crusader Kings in ages, mostly because I fell behind with the DLCs. I might actually get this bundle though, even though I don't want to support Paradox' crazy DLC spam.

I only own the base game in steam and wonder are the DLCs listed apart & can be redeemed individually?
If it's not the case, I'm afraid of a blocking from steam telling that I'm trying to add an already owned game!

This is one of the most awesome bundles I have ever seem. It has absolutely all the expansions, all 16, which is something very rare (it does not include cosmetics and other random DLC like EU4 converter, but proper expansions are all there). Even without regional pricing, it is almost half the price of buying everything on their best sales prices (and I think Holy Fury hasn't had a 50% off sale yet), and for those that already buy in dollars it should be about twice as good of a deal. Getting a complete and up-to-date Paradox game is usually the province of hardcore fans, but this makes it cheaper than many games are on sale.

Yes, Paradox puts a lot of fairly expensive DLC. But those are 7 years of improvements and additional content. It is like buying Total Warhammer 1 & 2 (each with its own DLC) and playing the big combined map campaign. Or like buying several continuations of an RPG that add out to make a super-long story. Frankly, for us enthusiasts that buy everything it is equivalent to buying several iterations of the same game; Crusader Kings 2012 to Crusader Kings 2019, in the hands of a AAA publisher, with day-0 DLC for each version...

Quoting: EverLinuxI only own the base game in steam and wonder are the DLCs listed apart & can be redeemed individually?
If it's not the case, I'm afraid of a blocking from steam telling that I'm trying to add an already owned game!

That's how it usually works, each item is an individual key. I have previously bought bundles where I only wanted the DLC and gave away the base game to friend. And CK2 was one such game (in a past bundle, not this one), so shouldn't be any different.

Quoting: EverLinuxI only own the base game in steam and wonder are the DLCs listed apart & can be redeemed individually?
If it's not the case, I'm afraid of a blocking from steam telling that I'm trying to add an already owned game!

I can confirm that there were separate keys for the base game and each DLC. If anybody wants a key for just the base game, and doesn't want to spend the measly $1, send me a PM, and I'm happy to share. ;-)

Thanks to both of you for these appreciated clarifications. Bought (supporting FSF & GOL <3 ).