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

Download Unavailable
This page documents an unreleased version.
While there is proof of this version's existence, it was never released to the public.

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[3]
    • Chunks near the player load in first now.[citation needed]




  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)
  3. "lwjgl IRC logs" – Echelog, May 13, 2009. "[18:55:45] <Notch_> the chunk size is 16x16 now.."