I installed this game on my iPhone and have been amazed at the amount of playtime I have for one dollar. What is the background on this game that allows them to have so much content? I've never heard of it before I downloaded it.
Here comes Wikipedia to the rescue!
The Battle for Wesnoth, or simply Wesnoth, is a turn-based strategy game with a fantasy setting, designed by David White and first released in June 2003. In Wesnoth, the player attempts to build a powerful army by controlling villages and defeating enemies for experience. White based Wesnoth loosely on the Sega Genesis games Master of Monsters and Warsong. He wanted to create a freely-available, open source strategy game with very simple rules, but one that had strong artificial intelligence and that was challenging and fun. The Battle for Wesnoth is available without charge for a variety of computer operating systems, and in the iPhone App Store for $4.99. The most current development version of the game, 1.9.3, was released on December 10, 2010. The latest iPhone version was released on May 31, 2010. Developed under the GNU General Public License, The Battle for Wesnoth is free software.