Half a billion apps out there and plenty of them are games — free, paid, and otherwise. How to cut through the clutter and get to the good stuff? To generate engagement and drive downloads for its mobile games, Electronic Arts launched the EA Daily Deals Web site. Over a five-week period, the program generated 14.5 million site visits with a 55 percent average visitor return. Good for game publishers? Oh, yeah. Deals are even updated dynamically and with offers for specific big local markets.