MUSLIM farmers do not keep pigs. This is as true of those who play at virtual agriculture as of those who fill physical food-troughs. So there are no pigs in the Arabic version of “Happy Farm”, published by Peak Games, a young firm based in Istanbul. For the same reason “Happy Farm” has no vineyards, and female farmhands wear the hijab. Local tastes matter. Peak Games has found rich soil. It already employs 200 people and has developers in Jordan and Saudi Arabia as well as Istanbul and Ankara. More than 35m people play its games at least once a month, many of them on Facebook. Half of the players are in Turkey; the rest are in the Middle East and north Africa. Rina Onur, one of its founders, says that she and her colleagues saw a gap in the online-games market that companies catering to Western tastes could not fill. So Peak Games offers people in Turkey and nearby countries games with a regional twist, like “Happy Farm”, as well as online versions of traditional amusements. Okey, a Turkish game played with tiles, is most popular.