Enlarge / Like the Beach Properties DLC itself, this property looks a bit unfinished and in need of some focus. (credit: Paradox Interactive) Perhaps the first clue that something was not quite right about Beach Properties, the first $10 DLC "expansion" for the already off-kilter city-building sim Cities: Skylines 2, was that it did not contain a real beach house, which one might consider a key beach property.