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data pack

SleeplessMinecraft data pack for 1.21.5

A gameplay-changing horror datapack for Minecraft 1.20.1-1.21 Inspired by TheLibrarianYT

server onlynewest supported 1.21.5AdventureGame MechanicsCursed
Latest version
1.1.0+mod
Minecraft
1.20 to 1.21.5
Java
Java 21+
Loaders
Data pack, Quilt, NeoForge, Forge and 1 more
Licence
GPL-3.0-only
Downloads
56.4k
Updated
18 mo ago
Available on
Modrinth
Space NodePartner

Host Sleepless servers

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

  • 1.21.5
  • Data pack
  • Quilt
  • NeoForge
  • Forge
  • One click install
  • Version matched
  • Automatic backups
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

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

Other data packs
MinecraftThroughJavaEvidenceReleased
1.21.5Data pack, Quilt, NeoForge, Forge, Fabric21+declared25 Mar 2025
1.21.4Fabric, Quilt, NeoForge, Forge, Data pack21+declared3 Dec 2024
1.21.3Fabric, Quilt, NeoForge, Forge, Data pack21+declared23 Oct 2024
1.21.2Data pack, Fabric, Forge, NeoForge, Quilt21+declared22 Oct 2024
1.21.1Data pack, Quilt, NeoForge, Forge, Fabric21+declared8 Aug 2024
1.21Data pack, Quilt, NeoForge, Forge, Fabric21+declared13 Jun 2024
1.20.1Data pack, Quilt, NeoForge, Forge, Fabric17+declared12 Jun 2023
1.20Quilt, Fabric, Forge, NeoForge, Data pack17+declared2 Jun 2023

Download

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

1.1.0+modrelease25 Mar 2025

sleepless-datapack-1.1.0+datapack.jar · 2.2 MB · for 1.21, 1.21.1, 1.21.2, 1.21.3

Download latest
793734002122…
Older versions7
  • 1.1.0+datapack25 Mar 20251.21, 1.21.1, 1.21.2, 1.21.3, 1.21.40.0 MB754 downloads5de0e79124cd…Get
  • 1.0.2+mod25 Dec 20241.20, 1.20.12.2 MB371 downloadsd36c0858fdf5…Get
  • 1.0.2+datapack25 Dec 20241.20, 1.20.10.1 MB51 downloadsf027c3e51727…Get
  • 1.0.1+mod23 Dec 20241.20, 1.20.12.2 MB171 downloadsd7cb65945cf6…Get
  • 1.0.1+datapack23 Dec 20241.20, 1.20.10.1 MB150 downloadsa94c9a8061c5…Get
  • 1.0.0+mod21 Dec 20241.20, 1.20.12.2 MB107 downloadsde99ce69c908…Get
  • 1.0.0+datapack21 Dec 20241.20, 1.20.10.0 MB84 downloadsc1f12575ff2c…Get

Frequently asked

Does Sleepless work on Minecraft 1.21.5?

Yes. 1.21.5 is the newest Minecraft version Sleepless 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 Sleepless support?

Everything the author has declared, from 1.20 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 Sleepless on the client or the server?

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

Which loader does Sleepless need?

Data pack, Quilt, NeoForge, Forge, 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 Sleepless?

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 data pack itself.

What licence is Sleepless under?

GPL-3.0-only, 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 Sleepless?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the data pack 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 Sleepless 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.

TerralithExplore almost 100 new biomes consisting of both realism and light fantasy, using just Vanilla blocks. Complete with several immersive structures to compliment the overhauled terrain.Towns and TowersSpice up your world with new villages, pillager outposts, and even new ships!TectonicTerrain shaping brought to new heights, grander and more varied than ever before!Incendium LegacyA nether biome overhaul combined with challenging structures to conquer, unique weapons to obtain, and tricky mobs to defeat.GeophilicA subtle-ish overhaul of vanilla Overworld biomes! Reworked!TrekBored of vanilla structure generation? This pack is for you!

Last checked 2 mo 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? .