From creating empire simulations to fending off alien invasions, Firaxis and Sid Meier have created some of the most beloved strategy titles. Now, the man behind Civilization is bringing his skills to strategic air combat in Sid Meier's Ace Patrol for iOS.

The title features 30 World War I aircraft and over 120 missions through which players can developer their squadron of pilots. In addition, the title features single-player, local multiplayer, and asynchronous competitive play via Game Center. Sid Meier's Ace Patrol will be free to download in the iOS App Store on May 9, 2012. In-app purchases will enable more campaigns and customized or upgraded items, including special aircraft.

This is the second Firaxis title to be slated for release this month. The first, Haunted Hollow, is a strategy title featuring an assortment of monsters. It will arrive on iOS tomorrow, May 2, 2013.