Self-replicating entities that have evolved on different planets merge and proliferate exponentially. In search of more energy sources, they consume other stars.
Aliens vs Predator: Requiem
The Alien Autopsy
Alien
Attack of the Swole People
AVP: Alien vs. Predator
Stalker
Doctor Who: Revenge of the Cybermen
Parasyte: Part 2
Titan A.E.
Alien: Romulus
Zygote
Planet 51
Starship Troopers: Traitor of Mars
Dark Star
Uranus 2324
Alien Attack at Groom Lake
Superman Returns
Alien: Containment
Blood Machines
Royal Space Force - The Wings of Honneamise