Premium Upgrades (BTD4)

Premium Upgrades are only available in Bloons Tower Defense 4 and Bloons TD 4 Expansion. They are available for purchase with NK Coins through a tab at the top of the screen when you click "New Game" at the Main Menu.

Here is a list of all the Premium Upgrades and their cost: 
 * Frag Bombs - Free
 * Double Ranga - 15
 * Exploding Darts - 7
 * Crystal Ball - 10
 * Dreadnaught - 12
 * Digital Amplification - 15
 * Monkey Tycoon - 12
 * Healthy Bananas - 15
 * Double Cash - 24
 * Buy Rank 31 (called Buy Rank 32 in Bloons TD 4 Expansion) - 12
 * Buy Everything - 100

Trivia

 * Some upgrade names as displayed in the "Premium Upgrades" tab are different than what they are called when they are clicked on. Here are the differences:
 * Exploding Darts is Explosive Darts when clicked.
 * Double Cash is Double Cash from Pops when clicked.
 * Buy Rank 32 is Top Rank Unlocks when clicked.
 * Buy Everything is All Premium Upgrades when clicked.
 * "Buy Rank 31/32" doesn't unlock the Laser Cannon because it changes your rank to 31/32, not 33
 * On your NinjaKiwi account, "Buy Rank 31/32" changes to "Buy Rank 34", which helps you unlock all the upgrades and modes.
 * Premium Upgrades used to be purchasable through MochiCoins, but have been replaced by NK Coins.