Social gaming operator Zynga has acquired mobile games developer Gram Games, the folks behind the popular Merge Dragons! title.

On Wednesday, Zynga announced it reached a deal to absorb Gram Games, which has 77 staff at two development studios in London and Istanbul. Zynga has agreed to pay $250m in cash plus a three-year earn-out based on the Gram team’s “achievement of profitability goals that align with Zynga’s long-term growth plans.”

Gram Games has found success within the hyper-Casual and Puzzle games segments, including the aforementioned Merge Dragons!, which made the Top 50 Grossing Games chart in the US Apple App Store following its release last year. Gram’s portfolio also includes the popular puzzle games 1010! and Six!

Zynga CEO Frank Gibeau claimed that bolting on Gram titles would grow Zynga’s audience by 3m mobile daily active users and predicted that Merge Dragons! would become a new “forever franchise” alongside Zynga Poker and Farmville.