To survive in the post-apocalyptic world of Echocalypse and save your sister, you will not only need to learn all the mechanics of the game to deal with enemies skillfully but also have a good supply of resources and useful items. The Crew of Kemono Girls, led by you, Awakener, will sometimes get into difficult battles, which will require a good level to win. In such a situation, you should use Echocalypse codes, which will be incredibly useful for both beginners and advanced users. Codes offer various useful rewards, often including the items that are lacking to upgrade your character to a higher tier.