Aeagle.237 net.games.rogue utzoo!decvax!ucbvax!mhtsa!ihnss!eagle!cw Fri Feb 26 18:11:02 1982 Rust Monsters and other monster ranges If you look at the code, the span for a monster is n to n+9 for 10 TOTAL levels. So the posting that suggests rust monsters from 9 to 18 is correct. As far as I could tell, monsters that can live at a level are equally likely to be there; there is no hump in the probability that a monster will appear.