15 - Unity Inventory System Tutorial (Equip + Save & Load)
Welcome to Lesson 15 of the full Unity 3D RPG course!
In this episode, we build one of the most important systems in any modern RPG: the Inventory System. This is where all the loot the player collects finally becomes useful — weapons, helmets, shields, consumables, and any item type you want to add later.
In this tutorial, you’ll learn how to create a clean, flexible, expandable inventory that works perfectly for RPGs, adventure games, hack-and-slash projects, or survival games. We start with the basics of storing items, then upgrade it into a full equip system where the player can actually change weapons, shields and helmets in real-time.
✔ Collect Items From the World
You’ll see how to let the player pick up items dropped from any world object. Items automatically appear in the inventory with correct icons and stats. The system supports different item types: weapons, shields, helmets, or custom item categories you can add later.
✔ Equip System (Sword, Shield, Helmet, etc.)
The equipped model appears on the character, replacing the old one. This gives your RPG a professional feel — players love seeing visual changes when they equip new loot.
✔ Remove / Unequip Items
Players can unequip items or remove them from the inventory completely. The UI updates instantly, and the character updates visually as well. Clean and simple.
✔ Save & Load Using IFormatter
The most important part: everything is saved.
– Inventory contents
– Equipped items
– Item stats
– Item IDs
You show how to save and load using IFormatter, which gives your game a stable, fast, and expandable way to keep player progress. When the game restarts, the inventory loads exactly the same way it was before.
✔ Flexible & Modular Code
The system is written in a way that lets you add more features later:
– Stackable items
– Consumables
– Rarity colors
– Tooltip system
– Weight or capacity
– Crafting system integration
The code isn’t locked into one type of game. It’s reusable, clean, and perfect for future lessons in the series.
✔ Works on All Platforms
The system works smoothly on:
– PC
– Mobile
– Tablet
– Web builds
– Consoles (if you ever port)
This lesson gives your RPG a complete foundation for equipment, loot, and progression.
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