The Sonic Generations level list was conducted almost entirely on fan feedback, unknowingly to the fans themselves. Between the game's development cycle, SEGA (specifically the "Sonic" Facebook page) released a poll back in 2009, along with other unimportant ones, simply asking the reader to list their favorite levels from each Sonic game, leaving fans none the wiser. The most mentioned levels from both fans and some internal employees became the official level list for Generations.