I believe you mean are there any cheats for Bloons Tower Defense 3?
If so, there are no cheat codes, but you can hack and cheat with certain programs like Cheat Engine.
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http://fliiby.com/get/298422/Bloons-Tower-Defense-3---Distribute-jhttd4p66g.html wait 30 seconds and download =)
Play on web.
If you mean is there a site where you can play Bloons Tower Defense 3 at school, or other places, that have a protective filter, the only site I can find is coolmathgames.com or englishbanana.com. If your school or work has these filters, they are there for a reason, and you are obviously not meant to be playing games on them.
How do you get a supper monkey as soon as you start the game