Cloudspire: Horizon's Wrath Faction Expansion - $33

The Horizon's Wrath is a massive airship that houses the remainder of an Ankarian race whose home island was destroyed in a biological attack. To survive, the Horizon's Wrath crew has adopted a form of aeronautic piracy, raiding other islands and stealing their Source to power the ship.

The Horizon's Wrath faction boasts a number of gameplay innovations, including a mobile fortress, a morale-based upgrade system and deadly cannonballs fired from its fortress. It also comes with four solo scenarios and two co-op scenarios, ensuring hours of gameplay no matter your play style.

—description from the publisher