Earthlings (Phantasy Star)

"We decided we wanted this planet. And you think you can stop us, we who destroyed Palma? You will die!"

- Earthlings

The 'Earthlings are the true, hidden villains from Phantasy Star II.

Story
The human civilization of Earth would become highly-advanced and prosperous, thanks to an aboundance of resources. However, humanity attempted to control nature, causing them to become careless in the way they spent those resources, ultimately causing the destruction of the planet. Before Earth perished, the few remaining humans built a spaceship named Noah and fled the planet, wandering the universe for ages until they reached the Algol System. They hid themselves through a radio jamming system and observed the life of the native races on Algol.

Jealous of the inhabitants of Algol, who were living in happiness despite their simple life, and already under the evil influence of Dark Falz, the Earthlings decide to seize the planets and exterminate all native life. For this purpose, they create the Mother Brain supercomputer inside their spaceship, infiltrating a network connected to it in the planets of Palma and Motavia, with only Dezoris being left out due to the Dezorian's distrust on machines. Under Mother Brain's watch, Palma became a futuristic utopia and home to the brightest sages, while Motavia was terraformed and turned from a arid landscape into a lush environment with forests and rivers.

With life in Algol becoming so perfect, it's inhabitants would end becoming too dependant on the supercomputer and basically leave all the planet's management under it's control. This was the Earthlings's plan all along, as Mother Brain's purpose was to make Algol's inhabitants weak and cathartic, thus allowing the Earthlings to easily exterminate them. When a group of agents from Motavia led by the protagonist Rolf starts investigating the appearance of biomonsters and Mother Brain's presumed malfunction, the Earthlings start taking measures against them, getting them imprisoned on the Gaira satellite after they unwittingly cause the destruction of the Climatrol weather control system in Motavia. The satellite is then routed into a collision course agains Palma, which is ultimately destroyed in the incident, though Rolf and his freinds are saved by a space pirate, who advises them to get help in Dezoris.

Rolf and his group travel to dezoris, where they find the sage Lutz, who had been cryogenically sleeping and waiting for the heroes arrival. Under Lutz's guidance, Rolf and his group retrieve the legendary Nei weapons and are taken inside Noah to put an end to Mother Brain once and for all. In order to protect the computer, the Earthling create a Pandora Box, with which they contain Dark Falz to block the way, but not only the heroes defeat Dark Falz but they also destroy Mother Brain. After this the heroes finally face the Earthlings, who reveal their story and their plans then attack the heroes all at once. Though the Earthling are said to have been all killed in the fight, the fate of Rolf and his friends is left ambiguous.