There are a number of common lines of Waste Rats. All started as regular rats, but have now become different due to their times in the Wastes.
1) The long and lean Leaping Rat is the most common. This rat has long strong, hare/ rabbit like legs. They also have tiny horns.
2) Six Legs are just that, six legged rats. Oh they have four eyes too. They like to climb and can be found anywhere in The Wastes.
3) Scalies are rats with reptile like scales. This seems to protect them from the worst of the acidic soils as they will swim and borough in the soil.
4) Flashers are small rats that have two wavy tentacles. These tentacles can emit small bursts of light. They can also generate quite an electric shock to those stupid enough to touch them.
5) Sprayers are medium sized, bright yellow rats that spit acidic venom like a cobra.
6) Twitchies: These scrawny rats seem to be poisoned by The Wastes and about to die. This is half true. They are partially immune to most of the toxins. Thus they continue to live in this state of half death for quite a while.
The Rats are a lesson to Prospectors and those that would live in The Wastes, do not stay overlong and without care, or you will no longer be human.