In the year 2025, ten billion people inhabit Earth. Science and technology have evolved immensely and people have begun to transform other planets to be able to sustain life. When a spaceship on a return trip from Mars carrying a large cocoon-like object explodes and crashes in Tokyo, it unleashes a seemingly unstoppable monster, Negadon, capable of destroying the world. Ryuichi Narasaki, a robot engineer haunted by his daughter's death caused by one of his creations, and his giant robot are Earth’s only hope. But after giving up robotics ten years ago, can Ryuichi and his robot defeat the monster from Mars and save all of humanity?
In the year 2047, the invaders came without warning, annihilating most of humanity in days. And while the survivors banded together to form a new world government to combat the threat, by 2053, mankind's outlook is bleak. Now, in a final desperate attack, hope lies only with a soldier who lost his father in the invasion, and a weapon more powerful than belief.
Negadon and Planzet are both CGI anime about people who defend Earth from an otherworldly being. Both anime feature mechs and have somewhat simular feel. Neither anime are all that great (though I personally liked Planzet a little bit more than Negadon); still, if you liked one you may want to check out the other.
These two anime have a surprisingly similar feel, production-wise, which makes sense as they share the same director. Both are fully CGI titles with a fairly shallow, formulaic sci fi plot that have a similar 'filming' style.
Forty years ago the citizens of Paradigm lost all of their memories, and live their lives without any knowledge of their past, or any hope for the future. Roger Smith is a man who performs the much needed task of negotiator in Paradigm. He provides his services to the wealthy with the help of a peculiar android named Dorothy and his mechanically inclined butler Norman. When greater evil arises, he calls on his magnificent relic of Paradigm's past, the Megadeus Big O. With Big O at his side, Roger Smith may be Paradigm's only hope of surviving in this new world without memories.