Zynga, Zynga, Zynga! The house of Z continues to dominate the social gaming charts in May 2011 (would you expect anything less?), but it's interesting to see that all of the FarmVille-creator's top games have taken a hit over the past month. The all-powerful CityVille lost nearly 1 million players, FrontierVille dropped 1.7 million players and a whopping 5.5 million players decided to send Mafia Wars to sleep with the fishes. That's gotta hurt. Well, maybe just a little.
As for the other Top 10 contenders, Gaia Online's Pokemon-inspired Monster Galaxy continues to gobble up the competition, gaining 2.9 million players this month, moving from #12 to #7. That move bumped down PopCap's Bejeweled Blitz and LOLApps' Ravenwood Fair, which both still seem to be hanging tough despite some negative numbers this month.