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Adds extra backpack inventory slots you toggle on demand with a configurable key, shown in a custom animated panel that slides in and out. Carry more loot without permanently cluttering the standard 4-slot hotbar. Standalone, no MimicAPI required.
C); the mod reads the key live each frame.Open with loot - the extra backpack slots hold real items.

Toggle with a key (default C).

Configurable grid sizes (AdditionalSlots) and the resting peek state with the key hint.



| Component | Version |
|---|---|
| MIMESIS | 0.3.0 (current Steam build) |
| MelonLoader | 0.7.3+ |
Dependency: LavaGang-MelonLoader-0.7.3.
Install through a Thunderstore mod manager such as r2modman or Gale. The MelonLoader dependency and the backpack asset are handled automatically.
InventoryExpansion.dll into MIMESIS/Mods/.Backpack.png at MIMESIS/Mods/Assets/Backpack.png (an Assets subfolder next to the DLL). Without it the panel still works but renders as a plain translucent box.UserData/MelonPreferences.cfg.Stored in UserData/MelonPreferences.cfg under the [InventoryExpansion] category. You can also edit these through a MelonPreferences UI.
| Option | Description | Default | Values/Range |
|---|---|---|---|
Enabled |
Enable InventoryExpansion functionality. When disabled, the mod will not modify game behavior. | true |
true / false |
AdditionalSlots |
Number of extra inventory slots to add on top of the game's default inventory size. Valid values: 4, 9, or 16 (square grids 2x2, 3x3, 4x4). Other values are rounded to the nearest valid option. | 4 |
4, 9, or 16 |
BackpackKey |
Key to toggle backpack visibility. Press to switch between standard inventory and backpack. | C |
Any Unity key name (case-insensitive). Invalid or empty values fall back to C. |
ReduceMovementSpeed |
When enabled, player movement speed is reduced to 50% while the backpack is fully open. | true |
true / false |
SelectBackpackSlotOnOpen |
When opening the backpack, move the selected slot to the first backpack slot. | true |
true / false |
RestoreStandardSlotOnClose |
When closing the backpack, return the selected slot to the standard inventory (the slot selected before opening). | true |
true / false |
FillBackpackFirst |
While the backpack is open, picked-up items fill the backpack slots before the standard inventory. Host / single-player only. | true |
true / false |
C) to slide the backpack panel in and out. The panel sits at the bottom-right of the screen and shows a key hint.SelectBackpackSlotOnOpen / RestoreStandardSlotOnClose).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.ReduceMovementSpeed on, you move at 50% speed while the backpack is fully open, and full speed is restored when it closes.Source code and issues: github.com/DooDesch/Mimesis-InventoryExpansion.