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BlockBoyMinecraft mod for 1.21.5

Gameboy Emulator for Minecraft. Works Serverside only

server onlynewest supported 1.21.5UtilityGame MechanicsSocialMinigame
Latest version
0.9.0+1.21.5
Minecraft
1.20.1 to 1.21.5
Java
Java 21+
Loader
Fabric
Licence
MIT
Downloads
3.9k
Updated
15 mo ago
Available on
Modrinth
Space NodePartner

Host BlockBoy servers

One click and BlockBoy is installed with the right loader, on hardware built for it.

  • 1.21.5
  • Fabric
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version BlockBoy declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.5Fabric21+declared25 Mar 2025
1.21.4Fabric21+declared3 Dec 2024
1.21.3Fabric21+declared23 Oct 2024
1.21.2Fabric21+declared22 Oct 2024
1.21.2-rc2Fabric21+declared21 Oct 2024
1.21.2-rc1Fabric21+declared17 Oct 2024
1.21.1Fabric21+declared8 Aug 2024
1.21Fabric21+declared13 Jun 2024
1.20.6Fabric21+declared29 Apr 2024
1.20.4Fabric17+declared7 Dec 2023
1.20.1Fabric17+declared12 Jun 2023

Download

From BlockBoy’s own host. Nothing is re-hosted here.

All 28 releases
0.9.0+1.21.5release24 Apr 2025

BlockBoy-0.9.0+1.21.5.jar · 0.5 MB · for 1.21.5

Download latest
d9fea61ac6a1…
Older versions24
  • 0.9.0+1.21.427 Dec 20241.21.40.5 MB255 downloads615e3b663321…Get
  • 0.9.0+1.2127 Dec 20241.21, 1.21.10.5 MB584 downloads7eb9892d9c43…Get
  • 0.8.1+1.21.2-rc122 Oct 20241.21.2-rc1, 1.21.2-rc2, 1.21.2, 1.21.30.5 MB116 downloads44c4d0cc38d8…Get
  • 0.8.1+1.20.19 Oct 20241.20.10.5 MB472 downloadsb20a6bda1eb0…Get
  • 0.8.1+1.219 Oct 20241.21, 1.21.10.5 MB165 downloads70c80d7c98a3…Get
  • 0.8.0+1.20.15 Oct 20241.20.10.5 MB62 downloadsdbf33c631f35…Get
  • 0.8.0+1.215 Oct 20241.21, 1.21.10.5 MB69 downloads95bb3c730c7b…Get
  • 0.7.0+1.20.124 Sept 20241.20.10.5 MB81 downloadsa888f556a869…Get
  • 0.7.0+1.2124 Sept 20241.21, 1.21.10.5 MB80 downloads0b5dcfdeb133…Get
  • 0.6.1+1.2121 Sept 20241.21, 1.21.10.4 MB84 downloads69a9566f30fc…Get
  • 0.6.1+1.20.121 Sept 20241.20.10.4 MB77 downloads9c72f8b2e8e1…Get
  • 0.6+1.20.120 Sept 20241.20.10.4 MB69 downloads83e2594a312f…Get
  • 0.6+1.2120 Sept 20241.21, 1.21.10.4 MB75 downloads512f0afe862a…Get
  • 0.5+1.216 Jul 20241.210.4 MB182 downloads4d9996b2bb2d…Get
  • 0.5+1.20.66 Jul 20241.20.60.4 MB91 downloads9cf1d97d6692…Get
  • 0.5+1.20.46 Jul 20241.20.40.4 MB89 downloads10219341853e…Get
  • 0.5+1.20.16 Jul 20241.20.10.4 MB229 downloads5f4bab016ba3…Get
  • 0.4.1+1.2115 Jun 20241.210.4 MB126 downloads25426802baa5…Get
  • 0.4.1+1.20.615 Jun 20241.20.60.4 MB89 downloads258d50b26bde…Get
  • 0.4+1.2115 Jun 20241.210.4 MB79 downloads6a07fcffd942…Get
  • 0.4+1.20.615 Jun 20241.20.60.4 MB72 downloadsa69979f4ef62…Get
  • 0.4+1.20.415 Jun 20241.20.40.4 MB59 downloadsfa4a95603a55…Get
  • 0.4+1.20.115 Jun 20241.20.10.4 MB95 downloads517f74ebf846…Get
  • 0.2+1.20.421 Apr 20241.20.40.4 MB124 downloadsbf542b55da80…Get

Frequently asked

Does BlockBoy work on Minecraft 1.21.5?

Yes. 1.21.5 is the newest Minecraft version BlockBoy declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does BlockBoy support?

Everything the author has declared, from 1.20.1 up to 1.21.5. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install BlockBoy on the client or the server?

The server only. Players join with an ordinary Minecraft client and install nothing.

Which loader does BlockBoy need?

Fabric. A build for one loader will not load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for BlockBoy?

Java 21 or newer, because that is what the newest Minecraft release it supports requires. The requirement comes from the game rather than from the mod itself.

What licence is BlockBoy under?

MIT, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install BlockBoy?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download BlockBoy safely?

From the author's own page on Modrinth, which is where the data here is synced from. MCReference never mirrors, re-hosts or repackages a file: every download button points at the original source, so you get exactly what the author published.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

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Last checked 6 d ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .