The next Bloons Tower Defense game and the next Bloons game will both have Cheat Codes. These are codes that can be entered to allow you to get more money, become more powerful, or have other such things happen. However, some codes can only be used a certain number of times, others can only be used every so often (you'd have to play a certain number of games or wait a certain amount of time before you could use them again), and most will usually be disabled during Special Missions (but some missions may allow them). They can be used in-game (through a button on the pause menu) or on the main menu.