The "vast black Ship" was a spacecraft used by Engineers that visited Earth during its primordial state. The ship was leaving Earth's atmosphere as a lone Engineer prepared to sacrifice himself by ingesting a black substance, causing his entire body structure to dissolve and seeding the planet with his DNA, and hastening evolution upon that world.
- The ship bears a strong resemblance to a typical flying saucer.
- During Mission 8: Rampart in Aliens: Colonial Marines, shooting the Pilot's head inside the derelict ship will activate a holographic battle between a ship similar to the Derelict and the Juggernaut and the vast black Ship.
- In production designer Steven Messing's concept art, the ship is referred to as "The Pebble".