During the third quarter of 2010 , Viacom began seeking a buyer for Harmonix , recognizing they did not have the efficiency and capacity to deal with the cost of maintaining a video game developer compared with dedicated video game publishers . Ultimately , during the third quarter of 2010 , Viacom began seeking a buyer for Harmonix , recognizing they did not have the efficiency and capacity to deal with cost of maintaining a video game developer compared with dedicated video game publishers .