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 release 1.21.5Adventure Game Mechanics Cursed

Latest version: 1.1.0+mod
Minecraft: 1.20 to 1.21.5
Works with: Quilt, NeoForge, Forge, Fabric
Licence: GPL-3.0-only
Downloads: 56.4k
Updated: 19 mo ago
Available on: Modrinth

Our hosting

Host Sleepless servers

Deploy a server with Sleepless already added to the world, 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

Minecraft	Through	Java	Evidence	Released
1.21.5	Data pack, Quilt, NeoForge, Forge, Fabric	21+	declared	25 Mar 2025
1.21.4	Fabric, Quilt, NeoForge, Forge, Data pack	21+	declared	3 Dec 2024
1.21.3	Fabric, Quilt, NeoForge, Forge, Data pack	21+	declared	23 Oct 2024
1.21.2	Data pack, Fabric, Forge, NeoForge, Quilt	21+	declared	22 Oct 2024
1.21.1	Data pack, Quilt, NeoForge, Forge, Fabric	21+	declared	8 Aug 2024
1.21	Data pack, Quilt, NeoForge, Forge, Fabric	21+	declared	13 Jun 2024
1.20.1	Data pack, Quilt, NeoForge, Forge, Fabric	17+	declared	12 Jun 2023
1.20	Quilt, Fabric, Forge, NeoForge, Data pack	17+	declared	2 Jun 2023

Download

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

For Minecraft 1.21.5

Choose the loader you use before downloading.

Fabric, Forge, NeoForge, Quilt
1.1.0+mod · 25 Mar 2025
Multiple loaders are listed; verify the file before downloading.
Choose file on publisher ↗
Loader not listed
1.1.0+datapack · 25 Mar 2025 · sleepless.zip
Get release

Most recently published release

1.1.0+modrelease25 Mar 2025

sleepless-datapack-1.1.0+datapack.jar · 2.2 MB · for 1.21.5, 1.21.4, 1.21.3, 1.21.2, 1.21.1 +1 more · Fabric, Forge, NeoForge, Quilt

Choose file on publisher ↗

793734002122…

Older versions7

1.1.0+datapack25 Mar 20251.21.5, 1.21.4, 1.21.3, 1.21.2, 1.21.1 +1 more45 KB754 downloads5de0e79124cd…Get
1.0.2+mod25 Dec 20241.20.1, 1.202.2 MB371 downloadsd36c0858fdf5…Choose file on publisher ↗
1.0.2+datapack25 Dec 20241.20.1, 1.2059 KB51 downloadsf027c3e51727…Get
1.0.1+mod23 Dec 20241.20.1, 1.202.2 MB171 downloadsd7cb65945cf6…Choose file on publisher ↗
1.0.1+datapack23 Dec 20241.20.1, 1.2057 KB150 downloadsa94c9a8061c5…Get
1.0.0+mod21 Dec 20241.20.1, 1.202.2 MB107 downloadsde99ce69c908…Choose file on publisher ↗
1.0.0+datapack21 Dec 20241.20.1, 1.2045 KB84 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.

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?

Data packs install per world: put the downloaded file in that world's datapacks folder and run /reload, or add it when creating the world. No loader is involved. On a server, the world folder lives next to the server jar.

Where do I download Sleepless safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.

Works on the same versions

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

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