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An autoload (short for auto-loaded node) is a node or scene that Godot automatically instantiates and adds as a direct child of the root node when your game starts. Autoloads are accessible from anywhere in your codebase without needing to load them beforehand.

Think of autoloads as global objects that hold data or methods you need throughout your game. They're perfect for things like creating a database of items, managing audio that should keep playing between maps like looping music, or input systems that many different parts of your game need to access.

For example, you might create an ItemDatabase autoload to manage a collection of items throughout your game. In this example, each item has a unique ID (like "potion_red") mapped to its properties:

extends Node

var _items = {
	"potion_red": {
		"display_name": "Red Potion",
		"type": "consumable",
		"heal_amount": 50,
		"price": 25,
		"icon": preload("icons/health_potion.png")
	},
	"shield_wooden": {
		"display_name": "Wooden Shield",
		"type": "armor",
		"defense": 5,
		"price": 40,
		"icon": preload("icons/wooden_shield.png")
	}
}


func get_item(item_id: String) -> Dictionary:
	return _items.get(item_id, null)


func get_random_item() -> Dictionary:
	var random_item_id: String = _items.keys().pick_random()
	return get_item(random_item_id)

Once registered as an autoload in the Project Settings, you can access it from any script. This is an example of a chest that gives the player a random item when opened:

func _on_chest_opened() -> void:
	var item: Dictionary = ItemDB.get_random_item()
	add_item_to_inventory(item)