Pig Fortress

A Pig Fortress is what the pigs live in, in Angry Birds. They are what makes the levels hard. Pig Fortresses can be in any terrain: Mines, Jungles, Clouds, Normal Terrain, Construction sites, Desert etc.

Terrains

 * 1) Plains 1-1.png and ice.]]
 * 2) Desserts
 * 3) Mountains
 * 4) Sunset Mountain
 * 5) Jungle
 * 6) City
 * 7) Clouds
 * 8) Construction
 * 9) Western
 * 10) Cave