Clash Royale is a popular mobile strategy game developed and published by Supercell. It combines elements of collectible card games, tower defense, and multiplayer online battle arenas.
In Clash Royale, players build and upgrade their own deck of cards, which consists of various troops, spells, and buildings from the Clash of Clans universe. These cards are used to deploy units onto a small battlefield with two towers and a king tower on each side. The goal is to destroy more towers than the opponent within the time limit of three minutes (with extra time if there's a tie).
Gems are the premium currency that can be used to buy special offers, boost chest cycle timers, and purchase additional card upgrades and chests.