Clash Royale is a spin-off game based on the popular mobile strategy title Clash of Clans.
Royale is a free-to-play game that combines tower defense strategy, with card collecting and mobile online battle arena (MOBA) gameplay.
Players can build their own card decks, have 1v1 fights and decide where to drop their heroes onto the battlefield.
Developer Supercell said that Clash Royale has the opportunity to prosper in the eSports space, with the company encouraging casual and serious players to take part in the grassroots level of competitive play.
Typical game length: 3mins
Price: Free (plus optional in-game microtransactions)
Notable tournaments: Clash Royale Shangai Championship, ESL Helsinki
Popularity: Game sales not revealed by publisher
Twitch: 1.3m hours watched in October 2016 across all viewers
Launched: March 2016
App Store rating: 9+