"far cry 2" was announced by ubisoft in july 2007, with two large changes from the previous "far cry" games. first, the game use the dunia engine, a modified version of the licensed cryengine by ubisoft montreal. the dunia engine creates a completely open-world game with realistic physics and destroyable environments. secondly, "far cry 2" is more open-ended than "far cry," that means the player get to create their own stories with the other characters using an advanced artificial intelligence system.