Clash of Clans is a free-to-play title created by developer Supercell

Clash of Clans is a free-to-play title created by developer Supercell - a start-up studio that was formed by ex-members of Sumea, Remedy, and Sulake.
The game centres around building, maintaining, and expanding a small fantasy village, buy kingdoms of camelot gems   as well as repelling attacks from goblins, and setting off on adventures in search of enemy settlements to destroy.
We thought you might need a helping hand to get yourself off the ground. That's why we've created this guide. Be sure to check it out before you grab your sword and sprint blindly into battle.
The basics
There are three (yes, three) different forms of currency in Clash of Clans, so you'll have to be constantly keeping your eye on your wallet (or the top-right corner of your device's screen).
The first of these currencies is Gold Coins, which you'll earn in abundance from resource gatherers, cheap kingdoms of camelot gems  completing quests and missions, and a variety of other outlets.
Gold Coins can spent upgrading specific buildings, paying your workers to clear obstacles, purchasing decorations, and fortifying your village with defensive contraptions.
The second form of currency is Elixir. This pink substance is earned from resource gatherers but can also be stolen from the numerous goblin settlements that you raze to the ground.
You'll likely spend it training your many troops, upgrading the buildings that aren't covered by gold coins, and constructing storage buildings for your varied resources.
Finally, there are Green Gems, which we'd class as the game's premium currency. You can grab these through in-app purchases and special in-game promotions, and trade them in for coins and Elixir.
They can also be spent to instantly complete construction projects and other time-consuming tasks, as well as on special buildings.