candyKing Digital Entertainment, the Dublin-based game maker behind the smash hit "Candy Crush Saga," is relying on Brunswick Group for PR counsel as it pursues an initial public offering.

King, which operations in London and Mountain View, Calif., filed Feb. 18 for the IPO.

The 11-year-old company claims 128M daily active users, mostly via mobile devices. In addition to Candy Crush Saga, King's top games include "Pet Rescue Saga," "Farm Heroes Saga" and "Papa Pear Saga."

King, which listed a proposed offering price of $500M, said revenue exploded from $22M in Q1 of 2012 to $602M in Q4 of 2013 as it swung from a loss in 2011 to a $568M profit in 2013.

Susannah Clark is senior director of global communications for King, based in London.