ModsFinder

Fair Sophisticated Backpacks

by JACHUPOL

Fair Sophisticated Backpacks changes how Sophisticated Backpacks slow players down, applying a slowdown effect when a backpack is carried and limiting where the backpack inventory can be opened.

NeoForgeServer-side onlyAll rights reserved1.21.1

What it does

The mod adds a slowdown effect to players who carry more than one backpack: while the condition holds, the Slowdown 4 effect cuts movement speed by 75 percent. Backpack inventories are restricted so they cannot be opened from anywhere, which keeps the mechanic tied to the item itself. The mod requires Curios API and Sophisticated Backpacks, and it runs server-side only, so players join without installing anything. It is published for NeoForge 1.21.1 and is released under All rights reserved, not open source.

Key features

  1. Movement penalty

    Carrying more than one backpack applies the Slowdown 4 effect, which reduces movement speed by 75 percent.

  2. Restricted backpack access

    The backpack inventory can only be opened under the conditions the mod sets, not from any point in the world.

  3. Mount interaction

    The effect applies while riding entities such as horses, though custom vehicles may behave differently.

Compatibility

Latest build for each game version and loader.

1.21.11.0
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Required 2

Sophisticated BackpacksYet another backpack mod this time with backpack you can place in world, color in different color combinations, upgrade with more inventory and enhance with many functional upgrades
Required
Curios APIA flexible and expandable accessory/equipment API for users and developers.
Required

How it compares

Full comparison

Create Backpack Upgrades is a NeoForge 1.21.1 option that is client and server and released under the MIT License, with no open source code. Goulden's Vanilla Backpack is also NeoForge 1.21.1 and client and server, but it is open source under the MIT License, so its source is public.

ModLoadersGame versionsEnvironmentUpdated
Fair Sophisticated BackpacksNeoForge1.21.1Server-side only2025-10-16
Create Backpack UpgradesNeoForge1.21.1Client and server2026-07-05
Goulden's Vanilla BackpackNeoForge1.21.1Client and server2026-06-27

Questions

Does Fair Sophisticated Backpacks need Curios API?

Yes. Curios API and Sophisticated Backpacks are both required dependencies and must be installed alongside it.

In the catalog

Fair Sophisticated Backpacks is one of 17,631 Equipment mods on ModsFinder, and one of 7,420 Equipment mods for NeoForge. 32,366 mods support Minecraft 1.21.1.

Equipment mods17,631NeoForge modsMods for 1.21.132,366

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What the author says

Simple mod that give you a Slowdown 4 effect (-75% movement speed), whenever you have more than one backpack of any type in your inventory, on the back or anywhere else. It also applies to any entity you are riding (horses etc.), although it doesn't currently work for custom vehicles that may use different movement…
JACHUPOL, on the Modrinth page

Official listing

Owner
JACHUPOL
Published
2025-10-16
Updated on Modrinth
2025-10-16
Facts verified
2026-10-15

Tags

AdventureEquipmentGame mechanicsStorage
Open on ModrinthCompare