I wasnt exactly aiming for it to be in trem, more of a base for a high res version. I can lower the polies yep.
Here is the old model (not by me obviously)
http://err-overflow.deviantart.com/art/Big-Mofo-WIP-3-2605860EDIT: sorry, i was counting it with triangles, its has around 900 quads.
No, it will will have the fart cannon.
Anyway, another thing, the Tyrants face looks rather goofy and funny from the front, ppl will die laughing, not screaming with terror.
Here is abit more of an update of the face, teeth and such not changed, just resized the snout abit.

Looks good - I like the somewhat "skeletal" appearance of the head. The only criticism I have is that it's body looks rather lardy - like an S3 killwhore tyrant that insists on eating all of it's kills.
I made him more advanced and realistic, I had to enlarge the front legs and change the proportions so it can look abit more balanced.
Three things.
The chest and shoulders really looks like a man's body (although I don't see what it looks like textured). Make it more alien-like.
The eyes are ugly, they look like fish's eyes. Close them down a bit, make them more evil, but awesome looking.
Could you extend the shell stripes on the back a bit left and right?
So what features will your adv.Tyrant have (or are you just modelling)? Acid spray? Fire breath? Sonic roar? 
I want him to have a humanoid feel, the actual tyrant revolves around that IMO but was poorly done, (the structure of the arms makes no sense and doesn't seem so flexible or powerful.

The eyes are staying like that. As they will look like this:

Mind you, im still working on the face and will add more support under the eyes.
Like im sure iv said, dunno if i did..but ill try to adjust the back plates, i may have to remove the ones on the legs as they are taking up faces and look abit out of place.