BTD6 tower guide
Spike Factory BTD6 Upgrade Paths and Paragon
Spike Factory is a BTD6 Support tower for end-of-track insurance, spike piles, MOAB shredding, Perma-Spike safety, and Spike Paragon planning.
Updated 2026-06-13 by TDGameTools.
Spike Factory route map
Spike Factory starts simple, then splits into three Tier 5 jobs
Use Spike Factory near the end of the track as insurance, then still fix the upstream reason leaks are happening. It can save runs, but it can also hide weaknesses until a bigger wave overwhelms the pile.
Quick answer: what is Spike Factory for?
Spike Factory is backline insurance that catches leaks. Top path makes heavier spike piles, middle path creates timed spike storms, and bottom path becomes Perma-Spike for long-lasting safety.
Visual route map
Base Spike Factory splits into three recognizable routes
Read the route by role first, then decide which path solves the current run.
BaseSpike Factory5-0-0Super Mines0-5-0Carpet of Spikes0-0-5Perma-SpikeParagonMega Massive Munitions FactoryHow Spike Factory usually fits into a run
Use Spike Factory near the end of the track as insurance, then still fix the upstream reason leaks are happening. It can save runs, but it can also hide weaknesses until a bigger wave overwhelms the pile.
Upgrade routes
Spike Factory's three path identities
Use this as a role summary, not a patch-perfect damage table.
3-x-xSpiked Balls
4-x-xSpiked Mines5-x-xSuper MinesTop path
Super Mines
Heavy explosive spike piles for late-game cleanup.
- Best when
- The economy can support an expensive backline damage plan.
- Watch out
- It is too expensive to be a casual early safety purchase.
- Beginner read
- Learn cheaper Spike paths before chasing this.
x-3-xMOAB SHREDR
x-4-xSpike Stormx-5-xCarpet of SpikesMiddle path
Carpet of Spikes
Timed spike coverage and MOAB shredding support.
- Best when
- A dangerous round needs an active layer of map-wide insurance.
- Watch out
- Ability timing and cooldowns decide much of the value.
- Beginner read
- Use the ability before the leak reaches the exit.
x-x-3Long Life Spikes
x-x-4Deadly Spikesx-x-5Perma-SpikeBottom path
Perma-Spike
Long-lasting backline pile that stores safety over time.
- Best when
- The track end is stable enough for spikes to build up before danger rounds.
- Watch out
- A weak upstream defense can drain the pile faster than it builds.
- Beginner read
- Place it near the end and protect it from constant small leaks.
Common uses
When Spike Factory makes sense
- Place end-of-track insurance behind a mostly working defense.
- Use Spike Storm-style abilities for known MOAB-class danger rounds.
- Build Perma-Spike piles before late-round pressure arrives.
- Prepare the Spike Factory family for Mega Massive Munitions Factory planning.
Mistakes
What usually goes wrong
- Letting Spike Factory hide a bad main defense instead of fixing it.
- Placing it too early on the track where spikes are wasted constantly.
- Forgetting ability timing on Spike Storm and Carpet of Spikes.
- Buying expensive spike paths before the economy and core defense are stable.
Paragon branch
Mega Massive Munitions Factory
The Spike Factory Paragon combines the three Tier 5 Spike Factory paths. Use the TDGameTools calculator and planner pages before committing cash, pops, upgrade tiers, extra Tier 5s, and Geraldo totems.
5-0-00-5-00-0-5Mega Massive Munitions FactoryRelated BTD6 pages
Sources and scope
This page is a concise TDGameTools tower guide, not an official wiki clone. Use it to understand roles and internal planning links, then verify live game values for exact patch or boss-event planning.
FAQ
What is Spike Factory good for in BTD6?
Spike Factory is backline insurance that catches leaks. Top path makes heavier spike piles, middle path creates timed spike storms, and bottom path becomes Perma-Spike for long-lasting safety.
Which Spike Factory upgrade paths should I compare?
Spike Factory has three main route identities: 5-0-0 Super Mines, 0-5-0 Carpet of Spikes, 0-0-5 Perma-Spike. Compare them by the job you need, not by a single permanent best path.
Does Spike Factory have a Paragon?
Yes. Spike Factory connects to Mega Massive Munitions Factory, so use the calculator and planner links before committing a late-game or boss setup.