Social gaming overlord Zynga has officially snapped up rival studio OMGPOP, the creator of the Pictionary-style Draw Something app.Confirming reports earlier this week, the studios have reached an agreement, thought to be in the region of $200m (£120m).Draw Something has proved to be somewhat of a phenomenon over the last month, rising to the top of the iOS, Android and Facebook charts soon after its launch.The game requires its 30 million plus users to draw pictures based on word clues, while attempting to guess those doodled by opponents. It can also be played across platforms.Engendering social interactionsNoting the game's dramatic rise to the top of the social gaming arena, Zynga (which enjoyed similar success with Scrabble clone Words With Friends) has moved fast to acquire the title."The OMGPOP team has created a game that's fun, expressive and engenders real social interaction," said Zynga CEO Mark Pincus in a news release.