Java Edition pre-Classic rd-20090510

rd-20090510 is a pre-Classic version of Minecraft (or, as it was known back then, Cave Game) made on May 10th 2009. This version was unreleased. This is the first known build of the game to be compiled. No footage exists of this build.

Trivia
Development first started, using the RubyDung (a previous game that Notch was making, but was cancelled) source as a base.