The Last Voyage of the Harpy Express

Fabric modpack for Minecraft 1.21.1 by RAT

The Last Voyage of the Harpy Express runs on Minecraft 1.21.1 with Fabric. It has 10 mods, needs about 4 GB of RAM (our estimate) and runs on both client and server. The latest version is 1.4.1, released Sep 8, 2026.

Minecraft version: 1.21.1
Mod loader: Fabric
Mods: 10
RAM to allocate: 4 GB (estimate)
Runs on: Client and server
Latest version: 1.4.1 (Sep 8, 2026)
Downloads: 293K (#83)
First released: Nov 15, 2025
Pack file size: 53.9 MB
License: All Rights Reserved

What is The Last Voyage of the Harpy Express?

The Last Voyage of the Harpy Express is a Fabric modpack for Minecraft 1.21.1, published by RAT on Modrinth since 2025.

The latest release, 1.4.1 from Sep 8, 2026, declares 10 mods. It has 21 published versions.

With 293K downloads it ranks #83 of the 518 most-downloaded Modrinth modpacks we track.

Our notes on The Last Voyage of the Harpy Express

What sets it apart

This is not a survival pack. It is a social deduction game set on a train, and the project page calls it a train murder mystery. The game itself comes from the Wathe: Murder Mystery mod, and the Wathe page says this pack is the way to get the full experience, since the mod alone leaves out the map and companion mods.

The mod list is short: ten projects. Besides Wathe, it holds Simple Voice Chat, InvMove, Sound Physics Remastered, Ratatouille and Carpet, plus Fabric API and config libraries. Our data lists no shaders or content mods.

Who it suits

Friend groups and community servers that like party games. The page says a round needs at least six players and recommends 12 to 14, so it does not suit solo play.

Before you install

The pack runs on Fabric for Minecraft 1.21.1. Version 1.4.1 is dated September 8, 2026 in our data, and the project has had 21 versions since November 2025.

The page says the world must be set to peaceful and adventure mode, with PvP and command blocks enabled. A round starts when players board the train in the lobby and, once six or more are aboard, someone rings the horn. Others can spectate.

Playing with friends

This pack depends on friends. Modrinth lists client and server support, and our data marks both as required. The page says you must host a server with the included mods and map, and that players join that server.

Simple Voice Chat is part of the mod list, though the page does not describe how it is used. A ready-made server download is not documented; the page says only to host a server with the included mods and map. It also promotes a hosting discount code for one provider.

Written Nov 12, 2026 from public sources, not from hands-on testing. Sources: Modrinth project page, Wathe mod page (Modrinth), Modrinth version list. See our editorial policy.

Most widely used mods in The Last Voyage of the Harpy Express

The latest version declares 10 projects. The ones below appear in the most packs we track.

8 run on client and server
2 client only

Full The Last Voyage of the Harpy Express mod list

How its mod list compares

Less common picks: 2 mods found in five or fewer tracked packs.

Packs with the most mods in common

What kinds of mods are in The Last Voyage of the Harpy Express?

Of its 10 mods, 6 are tagged utility, 4 library and 2 adventure. Mods can carry several tags, so the counts overlap.

At 40% library, that is a larger share than 97% of the 491 packs we track.

utility: 6 (60%)
library: 4 (40%)
adventure: 2 (20%)
game mechanics: 2 (20%)
social: 1 (10%)
transportation: 1 (10%)

How big is The Last Voyage of the Harpy Express?

With 10 mods, The Last Voyage of the Harpy Express has fewer mods than 98% of the 491 packs we track and fewer mods than 99% of the 86 on Minecraft 1.21.1.

The pack file is 53.9 MB. 2 mods are client-only and 8 also run on a server. It declares no resource packs or shaders.

How actively is The Last Voyage of the Harpy Express updated?

The Last Voyage of the Harpy Express was first published on Nov 15, 2025, and has 21 published versions in total.

The latest release, 1.4.1, is dated Sep 8, 2026, 64 days before our data was fetched on Nov 11, 2026. Releases have covered 1 Minecraft version over 297 days.

Staple mods The Last Voyage of the Harpy Express includes and leaves out

Across the 325 Fabric packs we track, 15 mods turn up most often. The Last Voyage of the Harpy Express includes 4 of them; it leaves out Sodium, Lithium, FerriteCore, Entity Culling, Iris Shaders, Fabric Language Kotlin, ImmediatelyFast, YetAnotherConfigLib (YACL), Sodium Extra, Reese's Sodium Options and Architectury API.

How much RAM does The Last Voyage of the Harpy Express need?

The Last Voyage of the Harpy Express needs 4 GB allocated (3 GB minimum). Our estimate from the 10-mod list, not measured.

4 GB

How to set allocated memory

How to install The Last Voyage of the Harpy Express

Search for "The Last Voyage of the Harpy Express" in the Modrinth source of your launcher. Pick version 1.4.1 for Minecraft 1.21.1 (Fabric). Modpack install guide.

How do I make a The Last Voyage of the Harpy Express server?

The Last Voyage of the Harpy Express 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 1.4.1 for Minecraft 1.21.1.
Loader: Fabric.
Memory: at least 3 GB (our estimate).

Modpack server guide.

Versions

One build.

Minecraft	Loader	Pack version	Released
1.21.1	Fabric	1.4.1	Sep 8, 2026

Official links

The Last Voyage of the Harpy Express on Modrinth (downloads and changelog)
Source code
Discord

Facts on this page come from Modrinth's public API, last fetched Nov 11, 2026. Descriptive text is our own. Spotted an error, or are you the author and want something changed? See disclaimer and takedowns.