Unlike most Zynga-developed games, Empires & Allies has what Ajami describes as a pretty involved story and is “essentially a single player campaign.” You’ll make your way through a series of islands, defeating The Raven’s henchmen until you come up against the leader himself.
To make things a bit more interesting, you can’t actually produce all of the goods you need on your own gameboard, so you’ll need to visit and trade with friends to get specific resources.
A barracks, for example, will let you build new combat units, like planes, aircraft carriers, or zeppelins, while other buildings will produce precious resources, which are divided into four categories: farm, wood, oil, and metal.