MYSTERY SOFTWARE ANALYSIS:
These two NEOGEO games remain unknown. They are very early unused software product numbers.
Deductive reasoning tells us that the games would most likely have been developed by SNK or ADK
in 1990/91 since the system did not have official third party support until late 1991.
ALPHA: Even before the NEOGEO, SNK distributed several Alpha developed games. Sky Adventure,
Gang Wars, and Sky Soldiers are some examples. Perhaps some early NEOGEO software ideas may have
been ports, enhancements, or sequels of these games?
SNK: Baseball Stars and Alpha Mission were popular SNK games for the Nintendo NES, that were
rebooted by SNK for the NEOGEO hardware. Perhaps some of their other hit games, such as Iron Tank,
Athena, and Ikari Warriors were also considered?
-- 1989 -- The NEOGEO system and its early games are developed and designed by Alpha Denshi and SNK.
-- January 31, 1990 -- The upcoming NEOGEO game system is officially announced by SNK.
-- April 26, 1990 -- The NEOGEO MVS system is released for the coin op industry.
-- June 18, 1991 -- The NEOGEO HOME system is released for the game console market.