See exactly where your throw will go with a guideline that adjusts as you change your aim and power. Especially effective when using maximum power.
~ Upgrade description
Dart Guideline is a premium upgrade in Bloons 2 and is available in the Bloons 2 Store for free. However, if you want to get it, you must sign up for a MochiGames account. It can also be accessed by clicking the button that looks like a dart with a separated line in front of it and a red X through it (in between the reset button and the music/volume button).