Monkey Quest (partially found online multiplayer game; 2011-2014)
Monkey Quest was a fantasy/MMO game developed by Behaviour Interactive and launched by Nickelodeon in March 2011. The premise was that you played as a monkey traveling thought the land of Ook, interacting with other players, completing quests, battling monsters, and discovering secrets about the legendary Monkey King.
The game servers were shut down on September 26, 2014 so that Nick could focus on their mobile games. The launcher can still be downloaded, but as it is unable to get the patch info, attempting to log in will cause it to say the username and password is invalid. All that is known to remain of the game are a few images and some online videos.