Found on the Arcada by Roger Wilco. He wasn't sure what it was, but it was magnetic, and he used it to cheat on the slot machine in SQ1VGA. The description advises him to keep it way from the game disks, as the game was originally released on 3.5" floppy disks. Magnets can erase all data from floppy disks. This might confuse people who originally played the game on compact disc or Steam.