Monkey Quest was a massively multiplayer online game developed by Behavior Interactive and published by Nickelodeon. Preceded by a closed beta on December 14, 2010, it was officially released worldwide on March 17, 2011.

Nickelodeon described the game as having an "online experience that has the look and feel of a console game mixed with cooperative play". It was first revealed at the 2011 Game Developers Conference before its release later that year at the 2011 Kids' Choice Awards. Followed by subsequent updates throughout its 4 year life span, Monkey Quest ultimately closed on September 26, 2014, due to a "shifting focus towards other digital and mobile experiences". The app Monkey Quest: Thunderbow was also removed from the App Store on July 31, 2014.

As of October 2025, the game remains dormant in all official capacities.

The game took place in the land of Ook. The Monkey King was dying, and players needed to explore the world and find a way to cure him. Throughout the world, players would encounter many inhabitants and complete many quests. They could meet friends, buy or unlock new objects, and battle monsters. As the user played, their monkey unlocked more lands, discovered more about the legendary Monkey King, and could even become the leader of a tribe.

Players could choose to join one of four monkey tribes:

There were also in-game locations and non-player characters associated with a fifth tribe, the Mek-Tek. However, the game was shut down before the option to join the Mek-Tek could be added.

There were a large number of quests available throughout the game. Main quests could only be done once by every player. As the player leveled up their character, main quests would become more difficult to complete.

Daily Quests could be done once a day by any player, regardless of their current level.