Java Edition Classic 0.0.23a 01

0.0.23a_01 is a version of Classic released between July 11 and 12, 2009. It is the last version of Multiplayer Test. This version is not available in the launcher, but has been archived elsewhere.

Remake
To celebrate 10 years of Minecraft, a JavaScript remake of this version was uploaded to the Minecraft website, and made it possible to play multiplayer with up to 9 others through the browser. This version can be played at classic.minecraft.net.

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_01" 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.