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).
等级2
等级3
等级4
等级5
等级6
等级7
等级8
等级9
等级10
等级11
等级12
等级13