The "breathers breathe" bug is a logic error in the code and would be fairly simple to patch.Has anyone thought about fixing the dos and amiga versions so that slayers slay, breathers breathe, and bosses put up a fight?
The "slayers slay" I believe is in reference to the opponents' attacks not doing special attacks like poisoning, critical hit, wither, etc. From the code, the special attack is passed to the melee attack function but is never used. That can be fairly easily patched as well.
The "bosses putting up a fight" is the big one. The attack code for Tarjan (0x83) calls an empty function in the DOS and Amiga versions. Not having played the Apple or C64 versions I have no idea what kind of attacks Tarjan is supposed to have.