Resources

Stamina
Stamina is required to participate in various Missions. Depending on the difficulty of the Missions, each Mission entry requires 1 to 6 Stamina. Stamina recharges itself every five minutes. But there is a Stamina cap. Once the Stamina recharges up to the cap, it stops recharging. The cap increases as the player's level increases.

Player also has the option to purchase Stamina with Diamonds. One Diamond can be used to exchange for the amount of the capped Stamina. For example, player only has 1 Stamina left. And the Stamina cap is 25. Spending 1 Diamond will increase the Stamina from 1 to 26 (+25). The Stamina amount can go beyond the cap but it will not recharge until it goes below the cap.

Coins
Coin is a game currency for upgrading different objects in the game. Coins can be earned through completing missions. The following list gives some example where Coins can be spent:
 * Unit skill
 * Pilot level
 * Battleship level
 * MA skill
 * Standard Mobilization
 * Battle Tower items

Diamonds
Similar to a lot of mobile / smartphone games, Diamonds or Gems in the game can be used to exchange for Units through Mobilization. It can also be used to exchange for Coins, Stamina, additional chances in Story Mission, additional BP in Arena, and Battle Tower items.

Arena Points
Arena Point is earned through winning a battle in Arena. AP can be used to exchange for:
 * Universal Blueprint
 * Universal EN Tank
 * Unit Blueprints
 * Pilots