The Rabbit is a simple, easy to use 3rd generation language, which has interfaces to curses, networking support and a special "game" library linked to it, which was the reason to use Rabbit at all. The program rabbit itself is an interpreter. It was used successfully in Arno Riedls experimental game theory experiments. These experiments took place in the mid 1990 at the Institute for Adavanced Studies - Vienna where I worked at the time.
If you want to know more please find the research paper which I downloaded from Arno Riedl's Homepage.
The Rabbit Software plus documentation please find here.