Zynga is still the king of social gaming, but many in the industry have observed some cracks in its once thought impenetrable armor. That said, Zynga may be stepping up its game with its latest release CastleVille.

Just six days after launch, the new title’s become Zynga’s fastest growing game ever with around 5 million daily active players. For comparison, the last major Zynga hit, CityVille, had 3.2 million daily active players six days after its launch, and FarmVille had 2.7 million daily active players six days after launch.

Overall, Zynga had 236 million monthly players at the end of the first quarter this year, but that then fell to 228 million users at the end of the second quarter and 227 million at the end of the third quarter. Perhaps CastleVille is just what the doctor ordered before Zynga launches its IPO, likely next week.

Source: Business Insider