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Bigger stacks

The upgrade icon in BTD4.

BMC Bigger Stacks

BMC artwork

Bigger Stacks is the second upgrade in Bloons TD 4 or the first upgrade in the Path 1 in Bloons TD 5 for the Spike Factory. It allows the Spike Factory to create double sized spike piles, each pile being able to pop 10 bloons instead of 5 per pile.

PricesEdit

TriviaEdit

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