The game is set in a fantasy-themed[4] persistent world[5] where the player is the chief of a village. Clash of Clans tasks players to build and upgrade their own village using the resources gained from attacking other players' villages with troops, earning rewards, buying them with medals, or producing them at their own village. Players can create clans with others – up to fifty in a clan – who then can participate in Clan Wars together, donate and receive troops, and chat with each other. Players can also build up a Clan Village called a Clan Capital.[6] Clash of Clans received generally positive reviews from critics.; it is one of the highest-grossing mobile games of all time and a commercial success for Supercell, serving as a foundation of the company's live service mobile games.