Minecraft Wiki
For private development updates of this version labelled "0.30", see Java Edition Indev 0.31 20091223-1/Development.
Note: This version is not available in the launcher and is considered lost.

The first version of Indev 0.31 was released on December 23, 2009 at 00:40 UTC.[1][2]

This is the first version of the Indev development cycle of Minecraft, and the first paid version of Minecraft (available at €5.00), as Notch released this version for paid users to test out new features.[1]



Rana Rana
  • Has the player's shadows.
  • All other mobs no longer spawn.


  • Added dynamic lighting.
  • There are 9 different light levels.
    • Due to this, caves have now been made darker.
  • Oddly, blocks in the inventory and hotbar are affected by lighting - upon generating a new world they appear dark, then go back to normal brightness after a while.
  • Shadows appear below mobs.
  • Changed shading on the sides of blocks.
  • Placing a TNT block, and then destroying it, will cause the layer below to turn to wood, but only blocks made of the same material get replaced.[3] This was used by Notch to debug flooding.[4]



Game modes
Survival mode[verify]
    • The player now spawns with 99 stone slabs, stone, Water blocks and Lava blocks (leftover from an unreleased Indev 0.30 version).
    • TNT was removed from hotbar.
    • Removed primed TNT, arrows, block drops and all mobs except Rana from the code.
    • Blocks no longer drop items when mined.
    • Attempting to fire arrows will not do anything.
    • The player only has one bubble of air bubble when breathing underwater, down from 10.
    • No survival build of this version was released, so these changes go unused, and can only be found via modding.
  • Multiplayer was made partially inaccessible (although the multiplayer code still exists and can be re-enabled).
    • Connecting to a multiplayer server will cause players to spawn in a bedrock cube.[citation needed]
    • The game will act as if it is in Singleplayer – chat is inaccessible and the player list cannot be opened.
  • New work-in-progress level format.
    • Level saving/loading no longer works.
  • Dandelion (item) JE1 Flowers in the build screen are now shown with both sprites crossed.[5]
  • The player's fist no longer displays.
  • Rain will now go through glass.
  • The world is now generated as a small size by default.[6]
  • Grass block no longer spreads.
  • Leaf particles fall at the normal speed again.[verify]
  • The size of the .jar file has been changed (1765K instead of 285K the previous version (Java Edition Classic 0.30)) because of 4 new .md3 files. For more information, see Java Edition Indev 0.31 20091223-1/Development.


  • Generating new world in a huge size sometimes causes a lot of Rana to spawn close to the player, resulting sometimes the game freezing.
  • Placing a block on a slab causes the space between to be completely dark.
  • The top of the map is completely dark.
  • Block breaking particles are pitch black.[7]



  • IRC logs on Archive.org; #minecraft.20091222.log. December 22, 2009 (UTC−5).
  1. a b Oh, ok! Here, play with a version! – The Word of Notch, December 23, 2009
  2. IRC logs: "P6:40:14 <�08Notch�> http://www.minecraft.net/indev/" (00:40 UTC)
  3. Minecraft 0.31 Plank Glitch
  4. IRC logs: "P6:58:46 <�08Notch�> if you place tnt above ground and destroy it you can make roofs very fast" (00:58 UTC)
  5. IRC logs: "P6:48:18 <Iguana> Plants and such look very squished in the inventory. :P" (00:48 UTC)
  6. IRC logs: "P6:57:25 <�08Notch�> oh yeah, I made it default to small while I was developing for quicker map regeneration times. =)" (00:57 UTC)
  7. IRC logs: "P6:45:39 <Snowman> Block breaking particles are pitch black" (00:45 UTC)