Vetřelci nepatří k roztomilím mimozemšťanům...a jejich život je velmi krvavý..Vývoj -Facehugger
                                                                                  -Chestburster
                                                                                  -Warrior
                                                                                  -Dělník
                                                                                  -Královna
                                                                                  -Hybrid
                                                                                  -Mutace
Místo krve mají agresivní kyseliny mohou lézt po zdech a velice rychle útočit...