The following is a list of all the items which become available when you reach a certain level. Once you reach level 13 and can obtain the Legendary assault rifle ("Warrior Assault Rifle") you will be able to obtain all in-game items (if luck is in your favour).
레벨 2
레벨 3
레벨 4
레벨 5
레벨 6
레벨 7
레벨 8
레벨 9
레벨 10
레벨 11
레벨 12
레벨 13