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Java Edition Classic 0.0.20a

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Classic 0.0.20a.png

Java Edition

Server versions

Release date

June 20, 2009


Client not archived

Protocol version


Missing Texture Block.png
This version is currently missing.
While this version is known to exist it is missing from the launcher and has not been archived elsewhere, meaning that it is currently lost.
If you believe you have a copy of this version, please post on the talk page.

0.0.20a was a version of Classic released on June 20, 2009, at 20:53 UTC.[1][2]



  • Accessed by pressing B and lists all available blocks.[1][3]
    • All available blocks previously used to be on the hotbar.[4]



  • /solid[1][10]
    • Used to toggle between placing normal stone and unbreakable bedrock.


  • Players can no longer destroy unbreakable blocks, although admins can.[1][11]
  • Cobblestone and sand are now available again, through the new inventory.
  • The scroll wheel for block selection was inverted.[12]
  • Removed the FPS limiter because it would cause the computer's clock to speed up.[13]


  • Players can no longer connect to some servers.[14]
  • Players can no longer break bedrock in singleplayer.[15]


  • IRC logs on; #minecraft.20090620.log. June 20, 2009 (UTC−5).
  1. a b c d e f g h i j "New server, new client version 0.0.20" – Notch, June 20, 2009, Tumblr
  2. IRC logs: "P3:53:35 <Notch> new up, new client up, there's a protocol change, so you need to update all servers" (20:53:35 UTC)
  3. IRC logs: "P3:55:09 <ZomBuster> but lol where did all the other blocks gone too" [...] "P3:55:23 <Notch> press B" [...] "P3:55:53 <AnnihilatorBeta> SO MANY BLOCKS" (20:55 UTC)
  4. IRC logs: "P4:01:23 <Miclee> Where did sponge and glass go?" [...] "P4:01:35 <liq3> Miclee: Press B." [...] "P4:04:19 <Rydia> i can only see 9 of the blocks" [...] "P4:04:25 <Miclee> Hit B" (21:01 to 21:04 UTC)
  5. IRC logs: "P3:56:14 <liq3> COLORED BLOCKS" [...] "P3:59:45 <Miclee> THERE ARE COLORED ROCKS?" [...] "P4:03:43 <mezo> the cloth blocks are an awesome addition" (20:55 to 20:59 UTC)
  6. a b IRC logs: "P3:54:30 <ZomBuster> FLOWERS :D", "P3:54:34 <ZomBuster> pretty flowers" [...] "P3:58:53 <C418> wow, there are flowers! :D" [...] "P3:59:07 <ez> oooooh flowers " (20:54 to 20:59 UTC)
  7. a b IRC logs: "P4:01:02 <C418> mushrooms!" (21:01:02 UTC)
  8. IRC logs: "P4:27:17 <vdgmprgrmr> Why do the shrooms die in the darkness?" (21:27:17 UTC)
  9. IRC logs: "P4:02:10 <Miclee> A white and yellow striped block?" (21:02:10 UTC)
  10. IRC logs: "P3:54:59 <liq3> ./solid" [...] "P4:05:44 <Miclee> New admin command: /solid" (20:54 to 21:05 UTC)
  11. IRC logs: "P3:56:52 <Notch> admins can place unbreakable blocks now" [...] "P3:56:57 <Notch> players shouldn't be able to break them", "P3:57:00 <Notch> admins can" (20:56 to 20:57 UTC)
  12. IRC logs: "P4:02:29 <mezo> notch, you inverted the mousewheel" [...] "P4:02:43 <AnnihilatorBeta> mousewheel seems inverted" (21:02 UTC)
  13. IRC logs: ""'P3:28:19 <Notch> the fps limiting did not work at all, so I'm taking it out. it caused a whole bunch of bugs with timing" [...] "P3:28:42 <LKA> Notch: I'm guessing the FPS limiting thing was why some of us have been seeing the game going somewhere around 1.5x to 2x faster than it should?" [...] "P3:31:26 <Notch> yes, LKA, I thin kso too", "P3:31:32 <Notch> so I'm taking it out for 0.0.20" (20:28 to 20:31 UTC)
  14. IRC logs: "P4:00:09 <Testvan> i cant connect to my own server anymore for unknown reasons" [...] "P4:02:06 <Cameron> lost connection suddenly. An established connection was aborted by the software in your host machine. The update broke my server, yes I installed latest server too. D:" (21:00 to 21:02 UTC)
  15. IRC logs: "P4:02:27 <C418> in single player, you can't delete those blocks [...] the black ones" [...] "P4:04:00 <Crusty> Admin blocks can't be deleted in single player, lol" [...] "P4:05:34 <greenslimy> Bug(or not): you cannot delete the blackrock" (21:02 to 21:05 UTC)