Taken in by the Masters at a young age, Zen grew up on the planet OM where he learned a futuristic form of ninja. Combined with his new knowledge of meditation, Zen would eventually become one of the most sought-after soldiers-of-fortune in the galaxy.
In Zen: Intergalactic Ninja, you assume the role of Zen in his biggest challenge ever. He must defeat the evil Lord Contaminous -- a vile being spawned from toxic wastes -- on the planet known as Earth. Meanwhile, he must protect Jeremy the Starchilde, who has found the powerful Geocrystal which the forces of Contaminous will stop at nothing to obtain.
You have the power to choose your path, as you must battle your way through four stages of environmentally friendly action. Each stage is composed of a unique mission, followed by a bonus stage and finally a boss stage. With your powerful Photon-Stick, it's up to you to destroy any pesky enemies that get in your way, the four bosses at the end of each stage, and even Lord Contaminous himself. It's the only way to save Earth from the forces of filth.