Thanks for the insights, all. Sounds like nothing is "necessary" and so I'll just get the base game and see where to go from there. Although I may have to get Silent Service to satisfy my GIUK Gap itches.

<t> With the Easter sale upon me, I was thinking of finally making the plunge on CMO. But if I'm getting the 30% off, I was thinking I should see if any of the DLC is "essential" (or whether I should just plow into the main game) -- some Paradox base games, for example, are enhanced by their DLC.<br ...