Use gems to get premium in-game items.
State of Survival is a building game where you can play as the head of a base. The main objectives of the game are to build a strong base on itself by collecting resources, defending itself from invading forces, and facilitating, and base-to-base upgrades.

•  Download the Game From Apple Store & google store
•  Go to the Settings
•  Enter the code sent to you in the box and press redeem