Alien 2: On Earth (1980)

Alien 2: On Earth
Horror, Science Fiction
A group of cave explorers are confronted in an underground cavern by a mysterious living rock. Little do they know that it bears home to deadly, flesh-eating creatures, intent on wiping out the entire human population. An ultra low-budget, unofficial and unauthorized sequel to the 1979 film Alien, although the plot has little connection to the original film.
Starring
Belinda Mayne, Mark Bodin, Michele Soavi, Benedetta Fantoli, Roberto Barrese, Judy Perrin, Danilo Micheli, Ciro Ippolito, Donald Hodson, Claudio Falanga
Directed By
Biagio Proietti, Ciro Ippolito