Spiked Mines (BMC)

For other uses, see Spiked Mines (disambiguation).

Spiked Mines

MultiplatformFlash

Spiked balls explode when they lose all their spikes.

Rigged with heavy explosives, the spiked balls are set to go off when they lose all their spikes.

Tower	Spike Factory — Path 1 — Tier 4
Cash cost	$14,000
Research
Requirements	City Level 20 High Explosives Workshop built
Cost	50,000 (Multiplatform version)  50,000  50 (Flash version)
Time	4 days
XP given	1,000

← Spiked Ball Factory

Spiked Mines is the Spike Factory's path 1 tier 4 upgrade in Bloons Monkey City. It upgrades the spiked balls from the previous upgrade with Spiked Mines, each spiked mine:

• Is thrown every 1 second.
• Has 21 pierce (instead of 20 on the multiplatform version).
• Explodes after all its pierce is used or when it terminates, each explosion:
  • Has 40 pierce.
  • Does 4 damage initially.
  • Applies a burn effect to bloons which does 1 damage every 2 seconds for 6 seconds.

However, on the multiplatform version, it is bugged to no longer deal +2 damage to Ceramic Bloons, and the explosion is also bugged to not soak through layers.

Stats

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Costs and sell values

Note: this list does not factor in Monkey Knowledge or other discounts.

Tiers	Mobile version		Flash version
	Cost	Sell value	Cost	Sell value
4-0	$18,825	$15,060	$18,825	$15,060
4-1	$19,625	$15,700	$19,625	$15,700
4-2	$20,875	$16,700	$20,875	$16,700

Strategy

Spiked Mines has consistent grouped cleanup in the Flash version, being an effective option at dealing with large amounts of Ceramics. While expensive for what it offers, it is a strong pairing with towers such as Aircraft Carrier and Robo Monkey which have good grouped MOAB or general single target damage. Because of the relatively smooth stepping stone from Spiked Ball Factory, purchasing this upgrade can be delayed until after purchasing the primary DPS tower of the game to ensure a No Lives Lost bonus.

Crosspath with Even Faster Production to further boost the speed of the mine production to deal with even more ceramics.

In the multiplatform version, the inability to soak the explosions through multiple layers combined with the lack of Spiked Ball Factory's Ceramic damage and lesser speed boosts of its crosspaths makes it significantly less effective to the point of uselessness.