Appvent Calendar '09 Free Game #2: TriDefense
December 2, 2009

The second free game on Blacksmith Games' Appvent Calendar '09 is TriDefense. TriDefense is a free-path tower defense game that features modifiable terrain, which you must use to your advantage by flooding the land or building over water to create new paths to force your enemies through. The game features a wide variety of missions with varying difficulties, ground, air, and water-based enemies, 18 different towers, the ability to fast forward, survival mode with endless waves, and leader boards and achievements via OpenFeint.
TriDefense has been available in the App Store for $3.99 over the last few months, but you can download it for free today only.