I first saw it from an ad on another familiar building game, the one that starts with an R... I think. Ironic, though that'd it be there of all places. I didn't get it, since my parents could not trust the internet at all when it came to buying things.
Years later after seeing a test video of the game, I got the demo, played it off and on the next two years.
One day, I decided to go back, I also checked the wikipedia page, having the massive coincidence that the game had been released on Steam that very day.
So, I waited a few days until Christmas and bought it.