 Regina's inventory may include key items, weapons, ammo, and medical supplies — the latter two of which she can only hold a limited amount. She can also mix certain items in order to upgrade them or make completely new ones, such as anesthetic darts. These items can be stored in "emergency boxes", which need be unlocked with special items called "plugs" before they are usable. Each emergency box is color coded as either red, green, or yellow. Each box can access the contents of any other unlocked box of the same color.
