Minecraft Wiki
Note: This version is not available in the launcher and is considered lost.

0.0.23a was a version of Java Edition Classic released on July 11, 2009, at around 14:16 UTC.[1][2]


Options menu
  • Customizable controls.[3]
    • Controls can be edited by navigating through the pause menu opened by pressing Esc.[3][4]
    • Players can no longer move with the arrow keys by default, instead, they move using WASD keys.
    • Pressing F no longer toggles the render distance.[5] as it is now set as an option.[6]
  • There are now separate options to turn off/on sounds and music.
  • FPS meter removed unless the "Show FPS" option is set.[7]
  • Clicking a player's name under the Tab menu pastes their name into the chat.[8]


  • Changed texture for menu buttons.
Water and lava
  • Sand and gravel no longer "fall" on top of water or lava as if it were a solid block.
    • Instead, they will fall through the liquid, and the liquid will replace the location where the block was placed.
    • This liquid was stationary but will flow once updated.
  • Pressing the ⊞ Windows key will no longer allow for jumping.


  • Classic 0.0.23a has the highest minor version number of all Java Edition versions, at "23". The highest in Java Edition Alpha is "17", with Alpha v1.0.17; the highest in Bedrock Edition is "221", with 1.16.221; the highest in Bedrock Edition development versions is "230" with 1.16.230 beta; and the highest in the full release of Java Edition is "10", with 1.7.10.


  • IRC logs on Archive.org; #minecraft.20090711.log. July 11, 2009 (UTC−5).
  1. "Back in the saddle, client 0.0.23a is out" – The Word of Notch, July 11, 2009
  2. IRC logs: "A9:16:20 * Notch changes topic to 'http://www.minecraft.net | Client 0.0.23a is out with new options and the ability to remap keys" (14:16:20 UTC)
  3. a b IRC logs: "A9:16:30 <Rock_D> huh, options?", "A9:16:39 <Adura> Via Esc" [...] "A9:28:01 <CheeToS> I like the new esc menu buttons" (14:16 to 14:28 UTC)
  4. IRC logs: "A9:16:47 <PuyoDead> hey, I like the new buttons" (14:16:47 UTC)
  5. IRC logs: "A9:21:23 <PuyoDead> wait, does F still do that as well?" [...] "A9:21:32 <CheeToS> PuyoDead: no" [...] "A9:22:36 <PuyoDead> awwww... I really, REALLY needed that key for render distance." (14:20 to 14:22 UTC)
  6. IRC logs: "A9:20:06 <CheeToS> Notch: aw man, you removed the varying render distances? I found it EXTREMELY useful :\" [...] "A9:20:18 <08Notch> no, it's still there!" [...] "A9:20:26 <08Notch> under options, though" (14:20 UTC)
  7. IRC logs: "A10:37:40 <Quatroking> where's my FPS counter", "A10:37:46 <citricsquid> escape > options" (15:37:40 UTC)
  8. "Back in the saddle, client 0.0.23a is out" – The Word of Notch, July 11, 2009