metroid zero mission

In the year 20X5 of the Cosmic Calendar, the Space Pirates attacked a deep-space research vessel and seized capsules containing samples of an unknown species that had been discovered on planet SR388. The Space Pirates' objective was to acquire these life-forms; known simply as Metroids, these floating organisms were incredibly dangerous as they could latch onto any other organism and drain its life-energy. Furthermore, it was possible to replicate Metroids in vast numbers by exposing them to beta radiation. The hypothesis that the Metroids were responsible for one of the greatest mysteries in the entire galaxy — the extinction of nearly all life on planet SR388