ModsFinder

ProgressiveInventory

by Neuromuser

ProgressiveInventory opens extra inventory slots as players complete achievements, starting from the default set of five.

NeoForgeClient and serverMIT LicenseOpen source1.21.1

What it does

Players begin with a standard inventory and gain 54 locked slots that open as achievements are completed. The rate comes from the vanilla achievement count: the total of 126 is divided by 54 and rounded down, so each opening is tied to a fixed number of completed advancements. The mod is a remake of the yyzsbackpack mod, reworked for NeoForge 1.21.1.

A server owner can set keepItemsAfterDeath to SAVE, so items stay with the player after death even when the keepInventory gamerule is disabled. Sorting and slot pinning are handled by the player. EMI is an optional dependency for recipe and item lookup. Servers that run it need every player to install it too. Files are published for NeoForge only, for 1.21.1, with 1.0.3.1 as the latest build from 2026-07-16, under the MIT License as open source.

Key features

  1. Achievement-based slot access

    Fifty-four additional slots remain locked until the player completes achievements, starting from the five default ones.

  2. Keep items after death

    With keepItemsAfterDeath set to SAVE, items drop with the player after death even when keepInventory is off.

  3. Sort with the Tab key

    Pressing Tab sorts the slots using the default key binding.

  4. Pin slots in place

    Alt and left click pin a slot so its contents stay in position when other slots are rearranged.

Compatibility

Latest build for each game version and loader.

1.21.11.0.3.1
ReleaseBetaAlphaNot available

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

Requirements

Dependencies declared by the latest file for each loader.

Optional 1

EMIA featureful and accessible item and recipe viewer
Optional

Use cases

Long survival runs

Players who keep a single world for a long time can grow their storage gradually instead of starting with the full inventory.

Servers with death rules

Server owners can keep items after death without enabling keepInventory for the whole world.

Who it’s for: Players and server owners on NeoForge 1.21.1 who want inventory space tied to progress through the achievement system.

Questions

Does ProgressiveInventory need to be installed on the server?

Yes. Every player and the server need a copy of the mod.

Which loader does ProgressiveInventory support?

Only NeoForge. Files exist for 1.21.1 alone, with 1.0.3.1 as the latest build.

Is EMI required to use ProgressiveInventory?

No. EMI is an optional dependency, so the mod runs without it.

How are the extra slots opened?

Slots open as achievements are completed, and the rate is set by dividing the 126 vanilla achievements by 54 and rounding down.

In the catalog

ProgressiveInventory is one of 36,990 Utility mods on ModsFinder, and one of 13,477 Utility mods for NeoForge. 32,366 mods support Minecraft 1.21.1.

Utility mods36,990NeoForge modsMods for 1.21.132,366

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What the author says

Mod i remade from yyzsbackpack by yyz729. Functionality: Adds 54 locked slots for each player, and each slot is unlocking by completing 5 (default) achivements (if you play vanilla mc with no mods that adding achievements, you can change this value to 2, for example [you can calculate needed value by yourself …
Neuromuser, on the Modrinth page

Official listing

Owner
Neuromuser
Published
2026-07-08
Updated on Modrinth
2026-07-16
Facts verified
2026-10-15

Tags

UtilityGame mechanicsManagement
Open on ModrinthCompare