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Slimes Adventure icon

Slimes Adventure

Fabric and Forge modpack for Minecraft 1.21.1 by NotWindx

Get it on Modrinth Full mod list (105)

Slimes Adventure runs on Minecraft 1.21.1 with Fabric and Forge. It has 105 mods, needs about 8 GB of RAM (our estimate) and runs on both client and server. The latest version is 1.13.4, released Sep 11, 2026.

Minecraft version
1.21.1
Mod loader
Fabric, Forge
Mods
105
RAM to allocate
8 GB (estimate)
Runs on
Client and server
Latest version
1.13.4 ()
Downloads
2.1M (#12)
First released
Pack file size
16.7 MB
License
All Rights Reserved

What is Slimes Adventure?

Slimes Adventure is a Fabric and Forge modpack for Minecraft 1.21.1, published by NotWindx on Modrinth since 2023.

The latest release, 1.13.4 from Sep 11, 2026, declares 105 mods. Across 60 published versions it has covered Minecraft 1.16.5 through 1.21.1.

With 2.1M downloads it ranks #12 of the 518 most-downloaded Modrinth modpacks we track, and its authors tag it as adventure, combat and magic.

Our notes on Slimes Adventure

What sets it apart

Slimes Adventure is built around Tensura, the mod based on the anime “That Time I Got Reincarnated as a Slime”. The pack’s job is to surround that mod with its add-ons and a friendlier world to explore.

On the current 1.21.1 build, the dependency list shows Tensura: Reincarnated alongside Mysticism, KumoDesu, Beyond Adventures, Not Enough Bosses and Better Subordinates. World generation is reworked with Terralith, the YUNG’s structure series, Moog’s structures and Explorify.

Base building gets the Macaw’s furniture and building mods, Sophisticated Storage and Tom’s Simple Storage. Waystones, Xaero’s maps and Simply Swords round it out.

Who it suits

Fans of the anime who want skills, evolutions and boss fights as the core loop, with exploration and decoration as side activities. It is not a tech pack. No automation mods beyond storage appear in the list.

Before you install

Three separate lines exist on Modrinth, and they are not equally current:

  • Fabric 1.21.1, labelled “RE”, last updated September 2026 (v1.13.4)
  • Forge 1.19.2, last updated November 2025
  • Forge 1.16.5, last updated October 2024

Check which line a guide or server is using before downloading, since the loader differs between them.

The page recommends allocating a minimum of 6 to 8 GB of memory.

The issue tracker has a small number of open reports, including one about memory leaks and one about servants not teleporting with the player.

Release notes on Modrinth only point to slimes-adventure.com for changelogs. That site and the wiki linked from Modrinth (notwindx.net) did not respond on November 12, 2026, so per-version changes are not summarized here.

Playing with friends

Modrinth marks the pack as required on both client and server, which fits a content pack: everyone needs the same mods, and so does the server.

The latest 1.21.1 build includes Simple Voice Chat, Open Parties and Claims, and a Tensura compatibility add-on for claims, so it is set up with group play in mind.

No server pack file is attached to the Modrinth releases. Whether the author provides server files or a setup guide elsewhere is not documented on the reachable pages. The project page links to a hosting partner and a Discord for support.

Written from public sources, not from hands-on testing. Sources: Modrinth project page, Modrinth version list, GitHub issue tracker. See our editorial policy.

Most widely used mods in Slimes Adventure

The latest version declares 105 projects. The ones below appear in the most packs we track.

  • 73 run on client and server
  • 12 client only
  • 20 server only

Full Slimes Adventure mod list

20 more files are bundled inside the pack without a Modrinth project, so we cannot name them.

How its mod list compares

Less common picks: 8 mods found in five or fewer tracked packs.

Packs with the most mods in common

What kinds of mods are in Slimes Adventure?

Of its 105 mods, 32 are tagged decoration, 32 utility and 29 adventure. Mods can carry several tags, so the counts overlap.

At 23% worldgen, that is a larger share than 97% of the 491 packs we track.

  • decoration: 32 (30%)
  • utility: 32 (30%)
  • adventure: 29 (28%)
  • library: 26 (25%)
  • worldgen: 24 (23%)
  • optimization: 8 (8%)

How big is Slimes Adventure?

With 105 mods, Slimes Adventure has more mods than 74% of the 491 packs we track and more mods than 60% of the 86 on Minecraft 1.21.1.

The pack file is 16.7 MB. 12 mods are client-only and 93 also run on a server. It declares no resource packs or shaders.

How actively is Slimes Adventure updated?

Slimes Adventure was first published on Jul 23, 2023, and has 60 published versions in total.

The latest release, 1.13.4, is dated Sep 11, 2026, 61 days before our data was fetched on Nov 11, 2026. Releases have covered 3 Minecraft versions over 3.1 years.

Staple mods Slimes Adventure includes and leaves out

Across the 325 Fabric packs we track, 15 mods turn up most often. Slimes Adventure includes 12 of them; it leaves out Lithium, Sodium Extra and Reese's Sodium Options.

How much RAM does Slimes Adventure need?

Slimes Adventure needs 8 GB allocated (6 GB minimum). Our estimate from the 105-mod list, not measured.

How to set allocated memory

How to install Slimes Adventure

Search for "Slimes Adventure" in the Modrinth source of your launcher. Pick version 1.13.4 for Minecraft 1.21.1 (Fabric and Forge). Modpack install guide.

How do I make a Slimes Adventure server?

Slimes Adventure is marked as needing a server-side install, so the server must run the same mods and version as the players.

  • Match the version: the latest pack version is 1.13.4 for Minecraft 1.21.1.
  • Loader: Fabric and Forge.
  • Memory: at least 6 GB (our estimate).

Modpack server guide.

Versions

Newest build for each of 3 Minecraft version and loader pairs.

MinecraftLoaderPack versionReleased
1.21.1Fabric1.13.4
1.19.2Forge1.9.3
1.16.5Forge6.3