Super Metroid

After having defeated Mother Brain, the leader of the Space Pirates who wanted to use alien creatures known as Metroids to dominate the world, the bounty hunter Samus Aran took the fight to the Metroids' homeland and eradicated them. Only a single Metroid larva remained. Samus took it to a galactic research station, and scientists assured her that the powers of the larva can be harnessed to help people. However, everything goes wrong when a dragon kills the scientists, takes away the larva, and destroys the research facility.