Java Edition pre-Classic rd-132151

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Java Edition

Official name

Cave game tech test / Cave Game tech demo[1]

Date developed

May 13, 2009

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This version is currently missing.
While this version is known to exist due to video or photographic evidence or from being mentioned by a developer and may have been publicly available, this version is missing from the launcher and has not been archived elsewhere, meaning that it is currently lost.
If you believe you have a copy of this version, please post on the talk page.

rd-132151 (officially known as Cave game tech test[2] or Cave Game tech demo[1]) was a pre-Classic version made on May 13, 2009. This version was never released. It is the first known version of Minecraft, or what was then known as Cave Game, to have been recorded, although there were some builds before this version.


  • Updated tile chunks
    • Chunks are now 16x16 instead of 8x8
    • Chunks near the player load in first now.




  1. "lwjgl IRC logs"Echelog, May 13, 2009.
  1. a b "Cave Game tech demo!"The Word of Notch, May 13, 2009
  2. "Cave game tech test"Nizzotch, May 13, 2009 – via YouTube (Archive)