Playdom has purchased social game publisher Acclaim Games. Acclaim is well known for Facebook game RockFree, 2 Moons, Age of Lore, and more. Playdom recently acquired developers Offbeat Creations, Merscom, Three Melons, and MetroGames for $5 million.

Playdom is now the biggest social game publisher on MySpace and has over 38 million monthly active users on Facebook. Chief Executive Officer of Playdom John Pleasants said “Bringing Howard and Neil into Playdom strengthens our leadership and bolsters our position as an innovative games developer for the future….”

Details of the deal were not released but it was rumored to be around $5 million.