By Sirian. This level is designed exclusively for use with the Duel mod. Included in this level are twelve dueling arenas consisting of a variety of tunnel networks of various shape, size and function.

"Rats (Duel)" is designed to provide players of the Duel mod a set of dueling arenas for close quarters combat, as contrasted with the Gentlemans Dogfight offered up in the level "Arenas (Duel)".