In Mason’s Rats I, we are introduced to Mason, a rather enigmatic character who is proprietor and sole live employee of a huge automated farm. When his farm is invaded by mutated rats possessed of high intelligence, Mason calls in the Traptech company which sells automatic devices intended to deal with infestation problems. Unfortunately, the rats on Mason’s farm are a little TOO intelligent for the successively more vicious machines provided by Traptech, and Mason must seek a rather unconventional solution to his problem … a truce with the rats, and an accommodation which allows them to live on a certain section of his farm. In Mason’s Rats II the farm is invaded by a group of black rat’s from neighbouring Smith’s farm, and Mason must not only manage to find a way to accommodate both his existing colony of [brown] rats and the new arrivals, but also find a way of ridding himself of the pesky salesmen who just will not stop arriving at the farm to give him advice on how to ‘solve’ his little problem… Finally, in Mason’s Rats III, Mason is faced with the problem of a government inspector who has received reports of the large rat colonies which Mason is allowing to exist on his property and who is convinced that such a thing cannot possibly be hygienic or proper. Mason’s choice is a stark get rid of the rats or lose his farming license.