| The purpose of this card is self-explanatory. When buying crystals for real money, you recieve twice the usual amount. Any crystals you buy will be multiplied by two! But be quick! This card only remains active for 24 hours, so use it whele you can!|
Attention! Bonus crystals are not taken into account in inferral transfers.
Double crystal is a pass in Tanki Online, which doubles the amount of crystals receive from crystal purchases for real money, without extra charge. Every day the player can randomly receive this pass when first entering the game, and the pass will expire after 24 hours.