A cat vs. mouse strategy game based on Vampirism Beast and Island Defense, which were among the most loved and popular custom maps in Warcraft III.
My brother helped me make a nice goldmine model! This building will require a lot of tech and cost a lot of lumber. However, it serves as a "golf farm" that trickles out gold slowly for the builders. While lumber is the main resource, gold is the most important and can be very difficult to acquire.