Java Edition Alpha v1.2.1

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Minecraft Alpha v1.2.1

Java Edition

Server version


Release date

November 5, 2010



Protocol version


Other instances
of 1.2.1
Missing Texture Block JE3 BE2.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While this version is known to exist, it is missing from the launcher and has not been archived elsewhere, meaning that it is currently lost.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.

Alpha v1.2.1[1] was a version of Alpha released on November 5, 2010, to fix bugs. Although the launcher claims to have this version available, the version listed is just a duplicate of Alpha v1.2.1_01.[2]


  • Hostile mobs now only spawn at light level 7 or lower regardless of height, as they did before Alpha 1.2.0.
  • Leaves particle colors now reflect the biome instead of having the grayscale texture.


  • Signs on the sides of cacti no longer crash the game.
  • Optimized CPU usage for mob spawning.
  • Music now plays in multiplayer.


  1. Minecraft Alpha 1.2.1, Minecraft Server 0.2.3 – The Word of Notch, November 5, 2010
  2. MCL-9282