Darius Alpha is a special "boss rush" version of Darius Plus. To get it, you had to buy Darius Plus or Super Darius, mail in a proof of purchase provided in either game, and be one of the lucky 800 people chosen to win it between September 21, 1990, and November 16, 1990. As such, it's one of the rarest games for the PC Engine.
This message appears at the beginning of the ROM. Similar text can also be found in Darius Plus.
DARIUS Version 1.10b 1990/4/21 Presented by NEC Avenue. Programed by Masas (Bit's Lab.) and Max (Bit's Lab.) Special thanks J.M.Kim Y.TOH Jariten
|The Darius series|
|Arcade||Darius • Sagaia|
|TurboGrafx-16||Darius Plus • Darius Alpha|
|Genesis||Sagaia • Darius|
|Sega Saturn||Darius II|