Hidden object games have been the lifeblood of the PC and Mac casual games market for years but have been seemingly absent on Facebook. . . . until now.

We just reviewed and gave Mystery Manor, a HOG on Facebook, 4 stars. And just moments ago, Playdom officially released Gardens of Time. I got a sneak peak of Gardens of Time at GDC and liked what I saw.

Check out both Mystery Manor and Gardens of Time and tell us: will hidden object games be as successful on Facebook as they have as PC and Mac downloads?