Supercell is a Finnish mobile game developer known for games like Clash of Clans, Boom Beach, and Hay Day. They excel at creating online worlds that encourage social interaction between friends and enemies through free-to-download games that entice players back through notifications and offer in-app expansions for a cost. Founded in 2010, Supercell was acquired by Softbank in 2013 for $1.5 billion and has since been valued at $5.5 billion with $1.7 billion in annual sales and $500 million in annual profits, spending heavily on advertising campaigns.