
Gamers-Association.com: "Outernauts is only Pokemon up to a point. The mechanics are there (and are arguably better than ever) for an addicting adventure across the galaxy, but the package is simultaneously roadblocked by a barrage of Buy Me Nows that break it all apart...Outernauts could’ve been the best game of the summer, and now I’ll never play it again." - Luke Frazier

GameSpot - Unfortunately, the current player count cannot keep up with the ongoing server costs.
Having already shut down the Facebook version of Outernauts, Ratchet & Clank developer Insomniac Games today announced that it's also closing the game's iOS and Android versions.

With so many people getting involved in games like Farmville 2 and SimCity Social and higher quality titles like PixelJunk Monsters, Outernauts and You Don't Know Jack showing up, the stigma that used to surround Facebook gamers is starting to face.

Interview with Rowan Belden-Clifford an Associate Designer on Outernauts.