Cave game tech test

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Cave game tech test
Cave game tech test.png

Java Edition

Official name

Cave Game tech demo[1]

Release date

May 10, 2009



Cave game tech test[2] is the name of a video released by Notch on May 13, 2009. While the version shown was never publicly available to play, it was developed from May 10, 2009,[3] and showcased on May 13, 2009. It is the first known version of Minecraft, or Cave Game, as it was referred to in this time period.



  • Physics
  • Lighting
  • Chunks
  • World generation
    • 256x64x256 tile map.
  • Caves
    • Reached down until a few blocks before the last layer of cobblestone, making a ravine.
  • Creative mode
    • This was an extremely basic version of it. The player could not fly or place blocks and there was no inventory or hotbar to get them from.


  • The player
    • Currently have no visible model.
    • Have a height of 1.7 meters (5 ft 7 in).


  • Air (not listed internally as a block at this time).
  • Cobblestone
    • Made with the same graphics from Notch's game RubyDung.
  • Grass block
    • Made with the same graphics from RubyDung.
    • Only grows on lit tiles.


Changes in the Cave Game code[edit]

The Cave Game Tech Test code was edited multiple times during the time it was developed. Here is a list of all known edits to the code:

  • May 10, 2009: Game created
  • May 12, 2009: Fixed a performance issue
  • May 13, 2009 (16:41 GMT): Notch made it only update two chunks per frame. The game generates blank chunks and the FPS is inaccurate.
  • May 13, 2009 (16:48 GMT): Game now runs smoother (78fps, 288 chunk updates)
  • May 13, 2009 (16:51 GMT): Chunks have been changed from 8x8x8 to 16x16. This was the build that Notch showcased on his YouTube channel.


  1. Cave Game tech demo!
  2. "Cave game tech test" – via YouTube (Archive)
  3. "About the game" by Mojang AB. Minecraft, March 1, 2010.