(Reuters) – Mobile gamemaker King Digital Entertainment Plc, best known for the hit puzzle game Candy Crush Saga, said it planned to raise up to $500 million in an initial public offering. The Dublin-based company had filed confidentially for an IPO with the U.S. Securities and Exchange Commission in September under the Jumpstart Our Business Startups (JOBS) Act. King offers more than 180 games in 14 languages through mobile phones, Facebook and its own website. Candy Crush Saga, which involves moving candies to make a line of three in the same color, was the top downloaded free app of 2013, and the years top revenue-grossing app.