Activision Blizzard has agreed to buy Irish-based King Digital Entertainment for $5.9bn (€5.35bn), unifying console and PC games ‘Call of Duty’ and ‘World of Warcraft’ with the leading mobile game ‘Candy Crush Saga’.

The Irish maker of the blockbuster mobile game Candy Crush Saga will attempt to raise as much as $500m in an initial public offering (IPO).