Basi: Reptilian? Nah. "Supposed to be a mini rant?" Never heard that story.
Seriously, look at Tremulous. Back then, you had what, this sequence?
Brown spider -> white reptilian thing missing a lower jaw -> red reptilian thing with both jaws -> dark blue bulky thing that now bites instead of slashes -> huge blue bulky thing that has an entirely different body shape and goes back to slashing
->Green weird meaty fleshy "unknown" "somewhat spider-like" (big front legs, big abdomen)
->Light brown/yellow 6-legged "semispider" that shed its ability to build along with its tusks, (most of its features aren't even like a spider, i.e. the 4 arms under, not in front of its head, and its hunched back, no visable mouth)
-> pink "lengthier reptilian" with longer legs and the teeth growing on the botoom of its head, armour growing on the back around its hunch, the wreird chest pattern starts here and is kept
-> more redder and bigger one with armour on its claws, grows side frills that emit electricity, and its lower jaw is complete, grows slightly fatter
-> Bigger, stronger with a "forehead" plate and tusks regrow from the frills, front legs become strong for pouncing, lose leg armour for lighter build, loses hunch armour
-> Front portion stands up, *magically* from the tusks (yeah, okay, there's a fault here), hunch is what causes them to raise up, headplate becomes head balance support
"Whoops, posture changed! (head seperated upwards instead of forwards)"
"Whoops, posture changed again! (neck shortens into a turtle-like, not refering to the long neck turtle btw)"
Moar armour! (*argh soo heavy... that i can pounce at blazingly fast speeds, yet cannot crush bones of a human and kill in one go)
Moar limbs! (more than trem even has!)
How I saw it when i first saw unv:
Spider -> ???
??? -> ???
??? -> Moar armour!
Moar armour! -> Moar limbs, lose that armour, brain exposed, who gives a fak if its a weak point, grow more limbs
@mara in more detail: I understand your points, but I'm not sure how does a thick "chunk" of armour emit electricity. Rather, the tremulous model's looks like it was vunerable to bullets as well though.