Crystals
Crystals
Crystals are ProTanki's in-game currency that allow players to purchase and upgrade equipment, buy supplies, passes, gifts and much more.
Your crystal balance is indicated at the top of your game's HUD 
There are a few ways of earning Crystals, such us:
- Playing battles;
- Collecting Crystal boxes;
- Completing Missions;
- Competing in official Game Events, eSports and Contests;
- Donations to the game through the Shop.
Earning Crystals Through Battles
Throughout the whole battle, the battle fund constantly increases. For simply destroying an enemy and achieving game objectives (point capture, return and neutralize, flag deliver and return) a small amount of crystals will be added to the battle fund, seen on the bottom-right corner in every battle. 
The battle fund may value and increase in respective to the length of the battle, the players' ranks in the battle, and the amount of objectives achieved. Once the battle is over, the accumulated fund will be distributed amongst all the players in the battle. A higher portion of the battle fund will go to the tankers on the winning team.
Tankers with a Premium Accounts get double their respective battle fund.
Crystal Boxes
As the battle goes on, Crystal boxes will drop around the map. These boxes are triggered randomly as the fund increases. (note: Crystal boxes can be disabled in the Battles settings.)
There are currently two types of Crystal Boxes:
- The common Crystal box, that contains
10 Crystals and can spawn hundreds of times per map. 
- The Gold Box, that contains 1000 Crystals, and spawns rarely as the game progresses.
See more on Crystal boxes.
Ways to Spend Crystals
- Purchase Turrets, Hulls and Paints;
- Upgrade any owned turrets and hulls to higher modifications;
- Purchase Supplies;
- Buy Gifts and unique Passes.
The items to purchase unlock depending on your Ranks.
- In order for a purchase to be completed, you need to have the required amount of Crystals.
- Once you have clicked Buy, you will have to confirm or cancel the purchase with either Yes or No.
- After Confirmation of the purchase, the price amount will be deducted from your account's balance and you will receive the purchases item instantly.
- Refunds are impossible, be careful!