Anno 1800 is a city-building strategy game set at the dawn of the industrial age. You grow small settlements into busy cities, run production chains, keep your population happy and expand through trade and diplomacy. Right now it costs $15.00 on Ubisoft Store, down from its regular price of $59.99.
It suits players who like planning, managing an economy and slowly building something big. If you enjoy optimizing supply lines and watching a city grow over many hours, this game is a good fit. It is available on PC.
When you buy the game at the discounted price, it stays on your account permanently. When the sale ends, only the price goes back up.