Here's their (infinitely more lame) version of a Chainsaw Zombie:

I mean... wtf? How lame is that. That's not a Chainsaw Zombie. Thats a brown fat bald turd with no nipples, a stupid chainsaw/penis, and camp as hell pair of leatherette boots. Its more of a LAMEsaw Zombie. Did you see what I did there? Did you? I just took the word 'Chainsaw' (inherently cool), and TURNED IT ON IT'S HEAD to form the insulting 'Lamesaw', which, I thought, was jolly hilarious. Yeah.
The more I look, the more it disgusts me. This guy is a disgrace to all the proper zombies out there and, as such, should be thrown into an industrial mincer full of angry hornets, covered in honey. In fact, NO. That would give it attention. It should be in the far, far, FAR distance of the huge zombie crowd scenes, where nobody without an electron microscope can see it. Thats the only thing THE ONLY thing that this creature warrants in the zombie world. In fact, it should be a werewolf, or a haunted scarecrow, or an insane monster, or a fuckin' mummy, one of the other lame movie monsters out there that are inherently uncool and, as such, can be screwed with as much as the Doom Designers like. Just keep this abomnation away from the proper zombies who have a job to do (wandering around in a comical fashion, bumping into each other, falling over, and very slowly catching/eating stupid old ladies with wooden hips).
This is what the Doom 3 Monsters Guide (I wasn't on there, I swear, I'm not a loser. Oli G found it, probably while searching for a chainsaw to go out and cut down some trees in his part-time job as a lumberjack: he is that manly) had to say about this sorry matter.
During your adventure on mars you'll learn that Chainsaws were accidently delivered on Mars, in which you'll later find zombies wielding the chainsaws... Chainsaw Zombies!
Unlike their counterparts Chainsaw Zombies can pack a punch, however their range is very limited and not to be feared.
Firstly, why the FUCK would you ever 'accidentally deliver chainsaws' to a planet? Do you know how much effort goes into a shuttle launch? They don't train the astronauts, design + build the spacecraft, fill it with chainsaws, set up the launchpad, hire all the workers, start up the computer system, clear the sky, launch the rocket, programmed to go to Mars, by accident. Its the kind of dipshit thing that even the American's couldn't pull off (ooh, topical humour, aren't I great?) So, yeah. Any why didn't Mars have any chainsaws beforehand? As, apparently, this planet is the home of the living dead, its the one thing you DO need. Chainsaws. Chainsaws.
Secondly: NOT TO BE FEARED? Its a ZOMBIE... WITH A CHAINSAW. They are the most terrifying beasts on earth. Count Dracula? A chainsawified (new word, there) zombie could take him. Darth Vadar? Screwed. Batman? Dead. Captain Scarlet? In hospital (he can't be killed, being the manly man he is). In fact, the only people I could ever consider taking a Chainsaw Zombie are Oli Gill and Hunter S. Thompson.
Hunter Thompson is a DUDE. He is probably one of the most hilarious writers I have ever read. Basically, his books revolve around him getting totally shitfaced and having wild and crazy adventures with violent and possibly psychotic people (ie. The Hells Angels, his Attorney, a guy trying to sell him a monkey). And when he died, his ashes were shot out of a cannon. Can you get much cooler than that? No. You fucking can't, no matter how hard you try.
So, in conclusion, this fella:
is a total dipshit, and should never be allowed the title of Chainsaw Zombie. This, children, is what a proper Chainsaw Zombie looks like:

... with any body. That guy could take the Lamesaw Zombie, any day of the week. Yeah. Hell, it would just have to look at it, with those cool red eyes and the lamesaw would piss itself and waddle off to annoy somebody else.
Honourary zombie killer: Roy, the PROPER Chainsaw Zombie, not the pansy imitator.