So now that Ck2 is on sale, i have been eyeing this game for awhile, what are some much have DlC?
The expansions.
1) Sword of Islam - for Muslims
2) The Republic - for republics
3) The Old Gods - for pagans and the earlier start date
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There are also two
content expanding mini-DLCs:
1) Legacy of Rome - adds Byzatnine flavor
2) Sons of Abraham - adds Abrahamic religious flavor
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The rest of the DLCs are just cosmetic ones, though I personally find the portraits ones a must-have; they're quite cheap, they improve the game immensely (on a technical level) since half of the time is spent looking at portraits (I got the CKII Collection with quite a number of them; I can't
imagine the game playing without them), and some of the good mods out there actually require them. I've got all save the Norse, Celtic and Turkish ones, which I'm thinking about purchasing this sale.
Other than that, I'm a history fan so I really want the historical coats-of-arms. I recommend the Dynasty Shields packs (I've got the 1st and 2nd one); if you're not really into authenticity and all that, or perhaps learning a few facts about some dynasties, then you can pass on them.
Many players actually replace CKII's music; it's entirely at your leisure on whether to buy them or not. Some, like the Old Gods' ones, feature astonishingly awesome themes.
As for the unit packs, for me they go to the bottom. Buy them only if you want to purchase some DLC and have nothing else on the wishlist.
You could buy the Ruler Designer, if you want to fully role-play and create a character similar to yourself in the real world. That's a great feature, and not too expensive, though not personally high up on my wishlist (and I don't think I've personally used it more than trying it out once).
The Customization Pack's in my opinion a ripoff, so I'd avoid it. It adds
some level of freedom in the game like the above.
The only pagans that are actually incredibly fun to play and have received immense work are the Norse. For
full experience, if you go for The Old Gods, buy also the Norse Portraits, Norse Unit Pack, Warriors of Faith Unit Pack, Hymns to The Old Gods, and perhasps the Military Orders Unit Pack too.
The
Collection is on sale too; I recommend purchasing
it:
http://store.steampowered.com/sub/26483/ (and then the SoA which is sadly not included in the package). It may include something you'd rather not buy, such as the Sunset Invasion DLC, or perhaps the Mediterranean Portraits which a lot of people find ugly, but it pays off pretty much overall.
What? All are, save for Rajas of India!
Not quite; the Songs of India and Persian Portraits aren't too.