Space Opera: Before the better-known Black Box was the Blue Box.

As far as I can tell, the contents are essentially identical between the sets.

Space Opera RPG (1st edition)

1980 … Edward E. Simbalist & A. Mark Ratner & Phil McGregor … Fantasy Games Unlimited (FGU) 7101

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Space Opera Science Fiction Role Playing Game

Volume 1: Characters & Starships

Volume 2: Equipment & Combat & Campaign

Sheets:

  • Starship Data Sheet & Planetary Survey
  • Military Intelligence Report (Planet) & Novagun Action Hit Table
  • Planetary Culture Report & Novafire Success Factor
  • Character Record Sheet & Straddling The Target & Novagun & Megabolt Ranges

See Also: 

Space Opera RPG (1982): Two versions of the Black Box

Space Opera roleplaying game: STAR SECTOR ATLASES

Shatterzone RPG in stock