Thursday, May 31, 2012
The base game is available for free download, but
as you might expect, it does not include all the game's content. Only one map called "Shell Isle" is available initially, essentially serving as a demo-esque deal. 11 other maps are available to purchase, if you upgrade to the full version for $4.99 USD via an in-app purchase.
If the screenshots below intrigue you, you can download the game directly from the App Store.