Based on 1977 Walter Bright DEC PDP-10 text-only PD and 1983/84 DEC PDP-11/PC text-only commercial releases; ported from 1987 Northwest Software/Interstel PC/Tandy/PCjr graphical commercial release. PC versions: CGA, EGA, Tandy/PCjr
Page views: 2990 - Last update: 6th March 2011
One version is common, at least one other version is rare
 Original game designed by William Bright and GUI created by Mark Baldwin.