Stern Minefield (1983) sw1 attract mode sound on = on off = off sw2 lives on = 4 off = 3 sw3,4 difficulty on on hard on off 3 off on 2 off off easy sw5 on 1 coin 2 credit off 1 coin 1 credit sw6 on 2 coin 1 credit off 1 coin 1 credit