Makes pollution generation and handling a much greater focus of the game, as pollution is both much nastier to the environment, to your factory, and to you, much more likely to turn the natives against you, and much harder to ignore. Also adds new technologies and infrastructure for environmentally-conscious factory planners to avoid the worst of these problems.
Improves the enemies tactics by using potential fields/pheromones allowing probing of defenses, retreats, reinforcements, counterattacking, breaching, raids, rallying death cry, and player hunting. Uses non-homing blockable biter projectiles. Adds new Enemies (disabled by default). Difficulty setting in mod options menu.