So, yesterday we have a nice Alium thread so let's try it again.
I must say, Billie is fine as hell.
Yep, yesterday's story time. try the archive.
Turns out Ripley and co go to the Alien home planet to steal the alpha Queen, take it to Earth to attract/gather the aliens in a place and nuke it.
They save the little girl.
Then we found out that the engineer was planning for all that in order to reclaim the Earth and starts terraforming to his needs.
He is rused by the POTUS who infect himself with a face hugger in order to assassinated him, since their race is really afraid of the xenos.
The xeno invasion on Earth never really goes away, the planet is visited againg in later stories and is pretty much fucked ever since, leading to some dark ages where part of the knowledge is lose/forgotten.