What are the release dates for Shadowgate - 1987 VG

Shadowgate - 1987 VG was released on:

USA: 1987 (Atari ST version)
USA: 1987 (Amiga version)
USA: 1988 (DOS version)
USA: December 1989 (NES version)
Germany: 1993
USA: 1993 (PC version)