I remember playing Hack on the Amiga 500 off a floppy disk back in the mid 80's. The splash screen stated that it was ported by John and Mary Ellen Tobes. It featured both an ASCII version and a graphical version similar to the current graphical version of Nethack, but the wall tiles were more like brick color. A lot of the monsters were the same, and the only pet was a dog. Although, you would sometimes find a chest containing Schrodinger's dead cat. The goal was to simply get to the lowest level, defeat the Minotaur, and ascend with the amulet and all your riches.