Crusader Kings III: Northern Lords
Although the DLC is good, it contains things that should have been in the base game from the start. We got a few new characters, events and options for potential playstyles and buffes, which is always nice. Playing as a viking is also interesting with all of mechanics focused on raiding, trials by combat, blood sacrifices etc. And although it makes playing as England an even more painfull thing to endure, it is historically accurate since living in England always was, and always will be a fucking nightmare. But as I said, looking at the historical period and the importance of vikings in it, this should have been in the base game from the start.
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