Take on the toughest environmental issues in the cosmos as Zen, a ninja-for-hire. Lord Contaminous is out to trash the Earth, and you're the only one who can stop him. As a master of martial arts and meditation, you'll take on enemies like Oil Slick, Smogger, Sulfura, and Garbageman. There are four environmental escapades to choose from: Rancid County Dump, Slixxon Oil Tanker, Acid Forest, and Pollution Dam. Each is filled with tricky traps, mean bosses, and plenty of unforeseen obstacles. Try out cool side games that have you cleaning up oil spills, shooting trash out of the sky, and much more. If you conquer all four main missions, you'll earn the right to face Lord Contaminous in the ultimate showdown.