Minecraft Wiki
For developmental versions of 0.0.13a, see Java Edition Classic 0.0.13a/Development.
Note: This version is not available in the launcher and is considered lost.

0.0.13a[1] was a version of Classic released on May 22, 2009.[2][note 1] This version is not archived or available in the launcher.

A version mislabelled as "0.0.13a" is available in the launcher. However, it has many differences from the version called 0.0.13a in 2009, which appeared to support regular terrain, whereas the launcher version strictly uses flat terrain. Additionally, many features from 0.0.12a are still present, such as using the "generating level" screen from that version instead of the one from 0.0.13a. This is due to it being an early development version and not the final release (see Development for more info); as it displayed 0.0.13a in the top corner, this was what it ended up being labeled as proper.



  • Added a thin black block selection outline.
    • This causes a bug where the white overlay vanishes when very close to a block on one or more of its sides.


  • Added level saving for players with accounts.[3]
    • Feature for registered and logged in players only.
    • Five slots in total.
    • Stored at the URL http://www.minecraft.net/play.jsp?name=<username>&id=<the slot saved in, starting from 0>.
  • Pressing Esc now opens the pause menu.



Oak Sapling JE2 Sapling
  • Changed the texture from Oak Sapling JE1.
Lava JE2 Lava
  • Is no longer transparent.
  • The mist underneath lava is now a thick red, instead of the previous shade of orange.


  • Holding the jump key no longer allows for auto jumping.
  • Player jump height reduced to its 0.0.11a value.
  • Swimming and sinking down in water is now much faster than before.


User interface
  • Game ratio is now 854×480, not 640×480.
  • The block being used is once again shown in the top right corner.
  • The world generating screen now shows darker dirt.
  • Holding down R no longer causes the player to cycle between different locations - holding the key now has the same effect as simply pressing it.[verify]
  • The terrain is no longer always generated a block above water.[4]
  • Lava and water will now always produce stone.[5]
  • Surface dirt layer is more uniform.
    • There is almost always a layer of grass with dirt under it above stone.
    • Cliff faces can no longer be made of pure dirt and grass.


1 bug fixed
  • Fixed textures touching the top and bottom of the map not being shown.


  • Transparency issue with water.[6]
  • Level saving sometimes does not work.[7]
    • The reason is because Opera and older versions of Java did not support a workaround Notch made to allow connecting to a host from an applet in LWJGL.[8]
  • When facing at certain angles a block can be placed where a block already is.



  1. TigSource uses UTC–8


  • IRC logs, #tigirc.20090521.log (May 21, 2009, UTC+2)
  1. "Minecraft: Huge level, teaser of 0.0.13a" by Nizzotch – YouTube via the Wayback Machine.
  2. "Minecraft (alpha)" by Markus Persson – TIGSource Forums, May 22, 2009.
  3. "minecraft.net goes live, and you can save your levels now!" – The Word of Notch.
  4. IRC logs: "(22:12:23) <Notch_> it's fixed in 0.0.13a. =)" (20:12 UTC)
  5. IRC logs: "(16:29:51) fartron: Notch_, how can lava float on water without forming stone? [...] Notch_: it can't in 0.0.13a. :D" (14:29 UTC)
  6. "Minecraft (alpha)" by Markus Persson – TIGSource Forums, May 22, 2009. "That transparency thing looks like a bug!"
  7. "Minecraft (alpha)" by Baltirow – TIGSource Forums, May 22, 2009. "The added saving feature doesn't seem to work in the last version (v0.013 something)."
  8. "Minecraft (alpha)" by Markus Persson – TIGSource Forums, May 22, 2009.