Does blowing up steampunk airships with your friends sound like a good time to you? Then you might want to pick up Guns of Icarus Alliance, which is currently available for free from Humble Bundle, until 12:59 PM EST, July 28th. Gameplay is heavily focused on cooperation between players, with each person taking on one of three roles: pilots, gunners or engineers. After picking one of six factions, you and your trusty team will man an airship of your making in player-vs-environment and player-vs-player battles and missions. Each success or failure has a direct influence on your factions struggle for dominance.