So what's the verdict on this? How has their support of this been? AA's write-up in the Weekend Playlist thread sounded interesting (was that a Deep Ocean adventure?) and sadly this is sitting in my Steam game list, never played.
Yes, hydrothermic power plants and tsunamis are two of the gameplay additions in Deep Ocean
. They're part of the expansion's general theme of expanding the Tech faction and associated underwater facilities.
I think it's a great expansion, but I would not consider it worthwhile for a newcomer. Nearly all of the additions are designed for people who have exhausted the base game, and there are so many unlockable technologies, career perks, and custom challenges in Anno 2070
that you could easily sink eighty hours into it without feeling like you were missing a thing.
My recommendation would be to spend some time with the original release, learn the basics in the campaign and tool around on a Continuous Map or two, and then see how you'd feel about adding underwater trade routes, enhanced black smoker harvesting, and some *very* high-end demands from the new tier of Tech residents. It's all very cool stuff, but hardly must-have material when you're learning whether or not you even like the game.