Java Edition Classic 0.0.23a 01

0.0.23a_01 is a version of Classic released between July 11 and 12, 2009. This version is currently available to play on the Minecraft website; it is not available in the launcher and has been archived elsewhere. It is the last version of Multiplayer Test.

Trivia

 * Notch planned to rename the version system after this version, removing the second zero and the "a". As an example, since this was the most recent version at the time, "0.0.23a_01" would be called "0.23_1" with such a system. However, this version was never actually given this name outside of this example.
 * Would follow the format ".[_]".
 * This format was also used somewhat in Beta.
 * For Minecraft’s 10th anniversary, this version was uploaded back on the Minecraft website, and made possible to play multiplayer with up to 9 others through the browser.