Build modular inventories without locking your game to one architecture.

Every item is an ItemDefinition shared by pickups, recipes, loot tables, equipment and inventories.

Built-in actions

↔

Drag & drop

Move, swap and merge stacks, including across inventories.

½

Split

Shift + click moves half to the first free slot.

•••

Context menu

Right-click exposes valid item actions.

i

Tooltip

Name, description, rarity, stats, weight and value.

Theme customization

Create Assets → Create → ModularInventoryPro → UI Theme. Configure colors, slot size, spacing, padding, sprites and fonts, or call:

uiManager.SetTheme(myTheme);

Where to make changes

Saved data includes slot index, Item ID, quantity, instance data, durability and Custom Data. Missing Item IDs are skipped with a warning.

saveManager.Save();
saveManager.Load();
saveManager.PersistBetweenScenes = true;
saveManager.ClearSessionData();
saveManager.DeleteSave();

string json = saveManager.SaveToString();
saveManager.LoadFromString(json);

Custom serializer

public class MySerializer : IInventorySerializer
{
    public string Serialize(InventorySaveData data) { /* ... */ }
    public InventorySaveData Deserialize(string json) { /* ... */ }
}
saveManager.Serializer = new MySerializer();

Subscribe in code or add InventoryEventRelay to wire UnityEvents in the Inspector.

InventoryEvents.OnItemAdded += (item, qty) => { };
InventoryEvents.OnItemRemoved += (item, qty) => { };
InventoryEvents.OnItemMoved += (item, from, to) => { };
InventoryEvents.OnInventoryFull += inventory => { };
InventoryEvents.OnItemUsed += item => { };

Custom action

[CreateAssetMenu(menuName = "MyGame/Actions/Teleport")]
public class TeleportAction : ItemAction
{
    public Vector3 destination;
    public override void Execute(ItemInstance item, InventorySystem inventory)
        => inventory.transform.position = destination;
}

Custom provider and instance data

inventorySystem.SetProvider(new MyCustomProvider());
instance.SetCustomData("quality", "masterwork");
string quality = instance.GetCustomData("quality", "normal");

Release checklist

• Unique stable Item IDs.
• Complete Item Database.
• Colliders on pickups and containers.
• Graphic Raycaster and EventSystem.
• Intentional Save Keys.
• Test scene changes, full inventory and old saves.
• Correct render-pipeline materials.
• Replace unused Demo-only systems.