Java Edition pre-Classic rd-20090512

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This article's name is unofficial.
An official name is yet to be given to the subject matter and may change at any time.
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This page documents an unreleased version.
While there is proof of this version's existence, it was never released to the public.

Java Edition

Date developed

May 12, 2009



rd-20090512 refers to a pre-Classic version of Minecraft (then called Cave Game) made on May 12, 2009. It improved the game performance by narrowing down an unknown performance issue.[1] This version was unreleased, and no footage exists of this build.


  • Fixed an unspecified performance issue.[1]


  1. a b "lwjgl IRC logs" (archived) – Echelog, May 13, 2009. "[13:34:09] <Notch> i was trying to narrow down a performance issue last night."