We can play Battleline: Steel Warfare completely for free, but if we want to increases our chances of winning a battle, we can visit the online store and spend some money. There are five categories in the store, which offer various goods that can make our units stronger or influence the result of the battle. It is worth mentioning that in the online store, we can spend three types of resources - sometimes we can choose how we want to pay, sometimes we need a particular resource. To remind - the currency available is Gold, Platinum and Valor.
In the first tab, we can view packages of items from the next three categories, which means equipment, ammunition, tanks and skills packed into one. Packages can be bought only for Platinum.
In the second tab, we can find various types of battle machines, which differ from each other not only with their size, equipment or special features (usage, strong and weak points), but also, what's very important, with their price and requirements. The requirements are the points that we need to fulfill to unlock a given machine. This can be the number of soldiers needed for operating the machine, or for example our level of experience. We can buy them for Gold or Platinum.
3. Battle Item
In the third tab, we can buy various items that we can use during battles, using the Inventory battle (through hotkeys of course). We can find here some repair gear, special ammunition or medkits. These items can all be bought for Gold.
4. Supply Item
In the fourth tab, we can find very useful supply items, like for example the ability to earn twice more gold during the game for a given amount of time, a skill allowing you to instantly repair a broken tank or a ticket that resets the upgrades on our machines. They can be bought for Gold or Platinum.
In this mysterious category, we can buy special (and very powerful) items and tanks, available only for Valor medals, which are very difficult to earn.