So all in all, just three titles make up 95% of King's business. That's a little alarming given the slowdown that has just started to materialize – maybe it's a blip, maybe it's a longer term trend. From the third to fourth quarter of 2013, the monthly unique player tally slipped from 13 million to 12.1 million, while revenues slid from $648 million to $632 million. That's the first sequential revenue decline the company has seen. In the meantime, tough total users of the games has been on the rise, over that same period the company saw a decline in the number of paying users. The declines were tied to slippage in the total or "gross" bookings in the Candy Crush Saga game, which were only partly offset by gains in other titles. Video games may be addicting but they are not essential. And to satisfy the hordes of avid gamers, video game companies must navigate the fickle demands of its audience with ever new, and ever "cool" titles. That's not easy to do, as the fellow game company Zynga ( ZNGA ) has shown.