Release dates on different platforms:PC-9800 Series:9/1/1984
C16:12/31/1984
CPET:12/31/1979
C64:12/31/1985
Atari8bit:12/31/1981
ti-99:12/31/1981
Acorn Electron:12/31/1984
TRS-80:12/31/1978
ZXS:12/31/1984
BBC Micro:12/31/1984
FM-7:12/31/1984
TRS-80:12/31/1983
vic-20:12/31/1984
PC-8800 Series:9/1/1984
Apple II:12/31/1980
C+4:12/31/1984