User blog comment:MilitaryBrat/Master Chief vs Xenomorphs/@comment-75.74.190.233-20120204032745

so much of this stuff is speculation the majority of it ain't true and is just most likely true and others ain't true trust me i'm a Xenomorph and Predator/Yautja expert and they can not resist bullets in AVP3 the bullets from a VP-70 handgun go right through them well 3 or 6 do and where did you get the idea that they can run 50 mpl if they could then why didn't they chase after the APC in Aliens when they were easy targets and the APC was on fire it seems like all of this is the stuff that a 10 year old who just saw Alien for the first time and is like That thing is so god damn bad ass so tough hardly anything could kill it it can do this it can do that

There are different types of aliens and cannons the three main ones are

Movies (best source) Books (not best but still optional) Games (mostly non-cannon due to game mechanics and other stuff)

The main reason we don't see Aliens due all of the feats I listed is because the movies came out before the books and the Movies and Books conflict with each other thus there are two types of Xenomorphs EU versions and Movie versions.