Aliens (or Xenomorphs as they are formally known) are living, breathing weapons with absolute adaptability, no fear, and no mercy. They will destroy anything that attacks them. With their acidic blood, tongues with teeth and tails that can kill, Xenomorphs are one of sci-fi's most fearful alien species.

1. Alien (1979)
2. Aliens (1986)
3. Alien 3 (1992)
4. Alien Resurrection (1997)
5. Alien vs. Predator (2004)
6. Aliens vs. Predator: Requiem (2007)
7. Prometheus (2012)
8. Alien: Covenant (2017)