Say “hello” to the Crystal Castles Prototype Serial #0067 by Atarisoft for the Commodore 64:

C64 Crystal Castles Prototype Serial #0067 - Commodore Computer Club

In doing some research, there were apparently only two prototypes of Crystal Castles known to have surfaced since the 1980s:

  • #0008 (in a private UK collection since 2002)
  • #0053 (recently sold on eBay January 23, 2016 for $404.00 USD)

And now #0067 as seen here on the Commodore Computer Club website.

Something interesting to note, Atarisoft only published the following 12 official Commodore 64 cartridges between 1983 and 1984:

  • Battlezone
  • Centipede
  • Defender
  • Dig Dug
  • Donkey Kong
  • Galaxian
  • Jungle Hunt
  • Moon Patrol
  • Ms. Pac-Man
  • Pac-Man
  • Pole Position
  • Robotron: 2084

Notice that Crystal Castles never had a official release on cartridge for the Commodore 64, just the small handful of prototypes that have surfaced.

According to Wikipedia Crystal Castles for the Commodore 64:

Simpler graphics, but the gameplay is quite close to the original. There are actually two versions: one by Atarisoft that wasn’t released at the time but purchased by US Gold and released in Europe in 1986; and one by Thundervision in the US in 1985.

So there you go, two versions for the C64: one by Atarisoft that wasn’t released (this prototype version) and the US Gold (Europe) / Thundervision (USA) version.

Fun fact: Crystal Castles was only officially released for the C64 on floppy disk and cassette tape.

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