Bigger Stacks (BTD4)

For other uses, see Bigger Stacks (disambiguation).

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Bigger Stacks
MobileFlash The factory creates double size spike stacks The factory creates double size spike stacks. Tower Spike Factory Cost $510 — Easy $600 — Medium $650 — Hard
← Increased Production White Hot Spikes →

Bigger Stacks is the Spike Factory's tier 2 upgrade in Bloons TD 4.

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