Clash of Clans is a popular mobile strategy game developed and published by Supercell. The game was first released for iOS devices in 2012 and later for Android devices. Here are some key features and aspects of Clash of Clans:

1. Gameplay: Clash of Clans is a real-time strategy game where players build and upgrade their own village, train armies, and attack other players to earn resources. The primary resources in the game are gold, elixir, and dark elixir.
2. Building and Upgrading: Players construct and upgrade various structures within their village, including resource collectors, defensive structures (such as cannons and archer towers), and offensive structures (such as barracks and spell factories).
3. Clans: Players can join or create clans, allowing them to team up with other players. Clan members can donate troops to each other, and clans can participate in wars against other clans.
4. Wars: Clans can declare war on each other, leading to a series of battles. Clan members can attack the bases of their opponents to earn stars and war points. The clan with the most stars at the end of the war wins additional resources.
5. Heroes: The game introduces powerful hero characters, such as the Barbarian King and Archer Queen, which players can deploy during battles. Heroes have special abilities and can be upgraded over time.
6. Events and Challenges: Supercell regularly introduces special events and challenges that provide players with unique opportunities to earn rewards and progress in the game.
7. In-App Purchases: While Clash of Clans is free to play, it includes in-app purchases for gems, which can be used to speed up upgrades, buy resources, and acquire special items. Gems can also be earned through gameplay.
8. Updates: The game receives regular updates that may introduce new features, levels, and balancing changes. Players are encouraged to keep their game updated to access the latest content.