Spike Factory

Overview

The Spike Factory creates piles of spikes within its range. At first each pile contains 3 spikes but it can be upgraded to have more spikes per pile. Costs $750.

Upgrades

	Bigger Pile Spike pile now pops 12 bloons $700 Total cost: $1,450		Unlock the challenge for this tower by unlocking 5M (Nebula). Complete the challenge to unlock 3S (Shield Generator).
	Faster Piling Produces spikes nearly twice as fast $1,250 Total cost: $2,700
Spike Ball Factory Does more damage to armored bloons $2,400 Total cost: $5,100	Titanium Spikes Titanium spikes pop twice as much and last longer $3,000 Total cost: $5,700	Moab Shredr Does more damage to MOAB class bloons $3,400 Total cost: $6,100	Shield Generator Shields that block and pop bloons $3,500 Total cost: $6,200
Rank 36 x5 Spiked Mines Mines explode when they run out of spikes $8,500 Total cost: $13,600	Rank 36 x5 Planetery Spikes Big spike pile pops 75 bloons $7,800 Total cost: $13,500	Rank 36 x5 Trvlr Spikes Generates more spikes that home in on MOABs $7,900 Total cost: $14,000	Rank 36 x15 Ultra Forcefields Much stronger forcefields $11,500 Total cost: $17,700
Rank 60 x9 Spike Wall Spike wall blocks thousands of bloons $10,000 Total cost: $23,600	Rank 60 x13 Nebula Creates mini-stars that pop 300 bloons $25,000 Total cost: $38,500	Rank 60 x11 Spike Storm Covers the track in spikes $13,000 Total cost: $27,000	Rank 60 x25 Lockdown Place the entire track on lockdown $42,000 Total cost: $59,700

Total to fully unlock: 88

Tips

• Can pop camo by default.
• Can pop lead with all upgrades tier 3 and beyond.
• Can damage HTAs with all upgrades tier 1 and beyond.
• The homing spikes from 4R have infinite range.
• 5M factory deals damage to shielded or static bloons instead of popping them on contact.
• Nebulas regrow over time, as long as they haven't reached their lifespans.
• Stack path upgrades cannot bounce back DDTs, ZOMGs and Trojan Bloons, but can slow down DDTs.

Advantages/Disadvantages

Advantages

• Can deal with bloons that sneak by your defenses.
• Has powerful abilities.
• Left path is good at taking out MOAB class bloons.
• Stack path gives towers more time to target bloons.
• A single nebula factory can solo a ZOMG.

Disadvantages

• Bad against shielded bloons and static bloons.
• VERY expensive at higher tiers.
• Ineffective if placed near the path entrance.

Towers