Incredibly addictive game. There's always something more to build, just another process to optimise or new technology to implement. Very hard to put down. At the moment the game is up-to-date on GOG. For multiplayer and other features you need to register the game at the company homepage. Not a big deal in my opinion, but your mileage may differ.
(75 hours played on Steam during Early Access) If you haven't played the board game yet, do yourself a favour and give it a try. It's not been #1 on boardgamegeek for ages for nothing. The computer game is an almost perfect adaption of the board game and that can't have been an easy task. The biggest advantage over the real thing is all the time you save setting up/packing away the real game. It makes it possible to have a quick game with friends for an hour or two, without having to plan for an extra hour of setup time. Really my only criticism is that you can't skip more of the animations or have them run parallel. They're well done, but I don't need to see 10 sekeleton warriors shielding themselves for ~3 seconds one after the other. Really only a very minor nitpick compared to all the stuff that the games does so well!