this game is the 4th in a series of world war ii vertical shooters published by capcom, and is the last game in the series developed by capcom. the previous games in the series "1942", "" and "" used the original capcom system or cps-1 and were released from 1984-1990. the cps-2 platform used by this game allowed for a different art style from that used in previous games. it is followed by "" in 2000.