Big Spender (BSM2 Mobile)

"Buy an entire tree of weapons in one go."

Big Spender is a hidden achievement in Bloons Supermonkey 2 Mobile. It rewards 75,000 Gold Blops upon completion.

Strategy
To get this achievement, make sure you leave at least one weapon type (e.g. darts, rangs) without any upgrades. Be sure to calculate the amount needed to upgrade to the highest grade, and then get all the upgrades without leaving the menu.

Blops required to max out upgrades:


 * 280,200 Red Blops: Rangs on either arm
 * 274,000 Red Blops: Darts on Core
 * 295,500 Red Blops: Rangs on Core

The player can also unlock this achievement by getting upgrades for Doctor Monkey. Usually by the time the player unlocks Doctor Monkey, they should have more than enough red blops to max out one of the cheaper weapon trees.

Trivia

 * This is the only achievement that can become permanently inaccessible after reaching a certain point in the game. In this case, it happens when Super Monkey, Ice Monkey, Storm Monkey, and Doctor Monkey all have their weapon types upgraded midway through before exiting the lab once.
 * Should the player end up with this and wish to obtain this achievement, they need to start a new playthrough of the game. This can be done by uninstalling and reinstalling the game, and then opting for the device save.
 * Before an update, Precision used to also be another achievement that may become inaccessible.