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This article documents an April Fools' joke. 
This feature was exclusively part of a joke version and is not currently planned for addition to regular Minecraft.
It is documented here on the wiki due to being officially-released content by Mojang Studios, even if not present in a final version.
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This feature is exclusive to Java Edition. 

The ACME Self-Building Lunar Bases are joke features that can be found on the moon.


Lunar bases generate in the moon biome. They have a 11024 chance to generate in a given chunk. [more information needed]


Main article: Lunar Base/Structure

Lunar bases look similar to a moon rover at first, with a dropper renamed to "ACME Self-Building Lunar Base" at the center. Pressing the golden pressure plate located on the rover, however, will start building an enormous lunar base. Adding objects to the dropper does not seem to change construction, although having blocks above it will prevent it from starting to expand.


The structure contains the following blocks:

The dropper that activates the structure building has a special tag 'Lunar', and can be obtained through the command setblock ~ ~ ~ dropper{Lunar:1b}, and can be activated by a light or heavy weighted pressure plate placed above it.


SoundSubtitlesSourceDescriptionResource locationTranslation keyVolumePitchAttenuation
ExplosionBlocksWhen a lunar base is activatedentity.generic.explodesubtitles.entity.generic.explode4.00.56-0.8416
None[sound 1]BlocksWhen the copper ball appearsambient.basalt_deltas.moodNone[sound 1]0.21.016
Fireball whooshesBlocksWhen the copper ball begins moving downitem.firecharge.usesubtitles.item.firecharge.use0.41.416
Beacon power selectedBlocksWhen the copper ball collides with the lunar baseblock.beacon.power_selectsubtitles.block.beacon.power_select1.01.416
Beacon activatesBlocksWhen a copper arm extendsblock.beacon.activatesubtitles.block.beacon.activate0.3, 0.8 [sound 2]0.3-0.6, 1.5-2.0 [sound 2]16
Sculk spreadsBlocksWhen copper spleaves are generatedblock.sculk.spreadsubtitles.block.sculk.spread0.60.45-0.6316
Block brokenBlocksWhen soul lanterns, polished blackstone buttons, shulker boxes, end rods, or chests are generatedblock.nether_wood.placesubtitles.block.generic.place0.60.6-0.816
  1. a b MC-179833
  2. a b Plays simultaneously

Data values[]


Java Edition:

Configured featureIdentifier
[No displayed name]lunar_base


Java Edition
23w13a_or_bAdded lunar bases.


Lunar bases are unsupported due to being an April Fools' joke, and therefore such issues relating to them will not be fixed.


  • The "ACME" at the beginning of the lunar base's full name is likely a reference to the "Acme" threading put at the beginning of various' companies' names in the late 18th and early 19th centuries as a way of having said companies' names appear near the top of alphabetical lists, popularized as a generic company name by the fictional Acme Corporation of the Wile E. Coyote and the Road Runner cartoons.
    • While stylized as an acronym in-game, the term "acme" comes from the Greek ἀκμή (acmḗ), meaning "peak", "zenith" or "prime", though backronyms such as "A Company Making Everything" and "An American Company that Manufactures Everything" are popular folk etymologies.


See also[]


  1. a b c d e Rover only
  2. Renamed to ACME Self-Building Lunar Base
  3. a b c d Both in the Rover and the finished Base
  4. Only present while generating the base
  5. a b c d e f g h i j k l m n o Base only
  6. Renamed to "Moon Mission Resupply Crate"
  7. Renamed to "Lunar Laboratory Equipment"