It's a really cool roguelike basebuilder game and the Ancient Seals is the most recent of many updates for it that we've gotten, adding more goals in the game and an overarching narrative / progression in each cycle so settlements feel more connected than before.
It's relatively cheap, the developers are great at supporting the game and listening to feedback, and I definitely recommend it for anyone curious about it. The game has felt finished and very polished for over a year now so don't let the early access tag dissuade you from trying it out
tl;dr It's a good game and it's consistently getting better