Circus missions is the first new area which unlocks after you have collected enough entry tickets for the circus area. This mission area however does not work on android devices. After many a mission you will eventually get a monkey pet but the area will close after that.
The area gets unlocked at level 10. It is the first area to get unlocked. Other areas are Downtown (level 15), The Crash Site (level 20) and The Cure (level 25).
Please do add information to this categorial page by adding the category Circus missions to a single page which will then add it to this page automatically.