Oh, I almost forgot. Here are some more GW stuff buried in that wiki:
The Mutant Animals above where from my conversion notes -- the animal related ones I completed. I have been trying to make a complete compendium of GW monsters (and hopefully with a better name then The Mutant Manual -- there is another GM document with that title). It would not just have the iconic mutants for rulebooks and modules, but also the much overlooked ones for the first edition book (the ones form the random encounter lists) and the mutants from first edition Metamorphosis Alpha (although, a number them appeared in 2nd ed GM).
Bonus:Gamma World RobotsBIGOONNo. Enc.: 1d6
Movement: 120' (40')
Armor Class: 6
Hit Dice: 15
Attacks: 3 (2 claws, 1 Bite)
Damage: 1d6/1d6/4d6
Save: L8
Morale: 7
One glance easily identifies a Bigoon as a giant, mutated raccoon. The creature is well over 6 feet tall (old males being known to reach 9 or more feet in length, nose to toil). The Bigoon’s teeth are very much enlarged, and it bites for 4d6 of damage. The creature also has heightened strength to complement its native intelligence and cunning. Despite its increased size and strength, the Bigoon has lost none of the manipulative dexterity of its small progenitor. The hand-sized forepaws of a Bigoon are quite nimble and can be used to open simple closures and latches.
The Bigoon is a nocturnal hunter and has infravisual capabilities. When hungry, a Bigoon attacks virtually anything, but the creature is prone to ignore other creatures if well fed, unless its curiosity is aroused. A well-fed Bigoon has been known to playfully knock down a passing human in order to tear open a carried sack. Fortunately, a blow from a Bigoon’s forepaw does only 1d6 of damage. A lone Bigoon is usually a rogue male. If three or more are encountered, they are likely to be a mother and her immature young.
Bigoons are all capable of climbing trees sturdy enough to hold their weight.