MIMESIS - InventoryExpansion

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Adds extra backpack slots beneath the inventory HUD. Press C to raise the hotbar and reveal them, using the game's own slot frames and key hint. Carry more loot without permanently cluttering the standard 4-slot hotbar. Standalone, no MimicAPI required.

Features

• Adds any whole number from 4 to 24 usable inventory slots and preserves the native cosmetic and equipment slots. Carried bags add their normal capacity bonus.
• Toggle between the standard hotbar and the backpack with a configurable key (default C); the mod reads the key live each frame.
• Opening raises only the inventory HUD, including equipment and weight. The backpack sits below it with native slot artwork, a faint backing and small side marks.
• Rows have at most 8 slots and stay centered and balanced: 9 slots use 5+4, 12 use 6+6, 14 use 7+7, and 18 use 6+6+6.
• A small native key badge at the bottom shows the configured toggle key.
• While open, slot cycling affects backpack slots. While closed, it follows the visible native hotbar, cosmetic and equipment slots.
• Cursor handoff on toggle: opening the backpack moves your selection to the first backpack slot, and closing it returns the selection to the standard inventory, so the cursor never stays stuck on a hidden slot. Each direction is configurable.
• Optional backpack-first pickup: while the backpack is open, items you pick up fill the backpack slots before the standard inventory (host / single-player only).
• Configurable movement-speed reduction (50% by default) while the backpack is fully open, restored automatically when it closes.
• Blocks large items from entering the open backpack and prevents opening it while holding one; configurable through BlockLargeItemsInBackpack.
• Automatically hides the panel during loading screens and map changes, and when you leave the game or return to the title screen.

Screenshots

Open with loot - press C to raise the native inventory HUD and reveal the backpack underneath.

Room for more - choose any whole number from 4 to 24 extra slots. Rows stay centered and use at most eight slots each.

Requirements

Dependency: LavaGang-MelonLoader-0.7.3.

Installation

Recommended: Thunderstore mod manager

Install through a Thunderstore mod manager such as r2modman or Gale. The MelonLoader dependency is handled automatically.

Manual

1. Install MelonLoader 0.7.3 into MIMESIS.
2. Download this package and place InventoryExpansion.dll into MIMESIS/Mods/.
3. Launch the game once to generate the configuration file at UserData/MelonPreferences.cfg.

Configuration

Stored in UserData/MelonPreferences.cfg under [InventoryExpansion].

Gameplay settings follow the lobby host without overwriting saved client preferences. Without the mod on the host, clients use vanilla behavior. Live settings apply after the host changes them through a MelonPreferences UI or reloads the preferences; editing the file alone does not reload it. Use the same current mod version on host and clients for the new options and live updates. Older versions retain their initial legacy snapshot. Invalid new values use the registered default with a warning.

Enabled and AdditionalSlots are structural and apply to the next lobby. Movement, pickup and large-item rules are live. Input, selection and HUD animation stay local.

Usage

• Press the configured toggle key (default C) to raise the inventory HUD and reveal the backpack underneath. Press it again to close the backpack and restore the original HUD height.
• When the backpack is open, slot scrolling and selection cycle through its slots. When closed, native visible hotbar, cosmetic and equipment slots remain available.
• Opening the backpack jumps your selection to the first backpack slot; closing it returns the selection to your previous standard slot, so the cursor is never stuck on a hidden slot (toggle each via SelectBackpackSlotOnOpen / RestoreStandardSlotOnClose).
• With FillBackpackFirst on, items you pick up while the backpack is open go into backpack slots first. This changes server-side placement, so it only applies when you host or play single-player.
• With ReduceMovementSpeed on, you move at the configured multiplier (50% by default) while the backpack is fully open, and full speed is restored when it closes.
• The panel auto-hides during loading screens and map changes, and when you leave the game or return to the title screen.

In multiplayer, install the mod on the host and clients using the extra slots. Clients automatically use the host's slot count and gameplay settings. Backpack-first pickup applies to the host's own inventory.

Source code and issues: github.com/DooDesch-Mods/Mimesis-InventoryExpansion.

Images

Screenshots and the package icon are captured in MIMESIS.

Built against MIMESIS 0.4.0 / MelonLoader 0.7.3.

Use InventoryExpansion 1.4.10 or later on both host and clients for counts other than 4, 9 or 16.