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Nexa was formed by Gilman Louie and a few college friends [1] in 1982 (incorporated 06/24/1982, California company entity number C1115094). In early 1987, British publisher Robert Maxwell's Pergamon Press purchased it and Spectrum Holobyte and merged them to form Sphere [2] (games continued to be marketed under the Spectrum Holobyte name). [3]

Louie's previous company was Voyager Software. [4]

Research Methods: Actual mentions, online resources (see Links), shared credits

Related Interviews: Kevin Seghetti


  • Portal (US Publisher: Activision)

Apple II

  • Delta Squadron (US Publisher: Nexa)
  • L.A. Crackdown (US Publisher: Epyx)
  • Portal (US Publisher: Activision)

Atari 8-Bit

  • All-Pro Football (US Publisher: Nexa)
  • Captain Cosmo (US Publisher: Nexa)

Atari ST

  • Portal (US Publisher: Activision)

Commodore 64

  • L.A. Crackdown (US Publisher: Epyx)
  • Portal (US Publisher: Activision)
  • World's Greatest Football Game, The (US Publisher: Epyx)


  • Ace of Aces (US Publisher: Accolade)
  • L.A. Crackdown (US Publisher: Epyx)
  • Portal (US Publisher: Activision)


  • Portal (US Publisher: Activision)

Mark III/Master System

  • Alf (US Publisher: Sega)
  • Monopoly (US/EU Publisher: Sega)


  • Captain Cosmo (JP Publisher: ASCII)
  • F-16 Fighting Falcon (JP Publisher: ASCII)
  • Starship Simulator (JP Publisher: ASCII)

Atarimania lists several Atari 8-Bit games that may have never been released: Adventures of the Baby Sea Turtle, Journey, Maze Master, Superbowl Football, and Das Unterseeboot.