Matthew Dillon has added hunt(6) to DragonFly, calling it “The best multi-player terminal game ever!” Does that exclude MUDs? Mangband? IRC? (OK, that last one stretches it.)  This version of hunt(6) came from OpenBSD, which came from the NetBSD version, all the way back to the original program in 4.4BSD.  (Thanks, Hubert Feyrer, for the history)