When brothers Igor and Dmitry Bukhman took the top spot of this year’s Sunday Times’ gaming rich list, perhaps what was lost in the shuffle was just how much of the men’s business flows through Ireland. The Russian-born brothers founded and head up Playrix, one of the world’s largest mobile gaming firms, which shifted its headquarters to Ireland several years ago with the company banking significant revenues here. Playrix isn’t exactly a household name but its fingerprints are all over mobile gaming through several popular mobile gaming titles, like Township and Fishdom, which have amassed more than 100 million monthly…