Upgrades are equipable items for one's plane that improve certain stats, and require upgrade slots to use. Upgrades may be taken off or put on for free at any skyland, and are kept forever (or until sold) after being bought.
This category has the following 4 subcategories, out of 4 total.
Pages in category "Upgrades"
The following 47 pages are in this category, out of 47 total.