PAN Vision and Tactile Entertainment have released Pigs in Trees, a new iOS game that puts players in charge of a group of tree-dwelling pigs that must defend their home from an invading army of woodpeckers. Described as the antithesis of Angry Birds, players use a real-time line drawing mechanic to navigate their flying pigs around a map shooting down enemy birds and racking up points. The game provides multiple ammo types and power-ups and challenges…