This is an old revision of the document!
SuSE 5.3
found as crosfire.spm\crosfire-0.93.5-15.src.cpio in http://ftp5.gwdg.de/pub/linux/suse/5.3/i386.de/suse/zq1/
Discussion regarding difficulty: http://archives.tclug.org/rte-crossfire/1994/Aug/msg00038.html
Passing reference in list of games: https://groups.google.com/forum/#!topic/rec.games.roguelike.announce/yXIci_KfFOU
Links appear dead.
Unknown docs: https://metacpan.org/release/MLEHMANN/Crossfire-0.8
Somehow related to Schmorp and Elmex