|“||Spikes become almost permanent.||”|
|~ Upgrade description in BTD6.|
Perma-Spike (sometimes referred to as Permaspike) is the final upgrade of Path 3 for the Spike Factory in BTD6. The spikes produced by the Spike Factory pop 50 bloons per pile (70 bloons with Bigger Stacks) but deal 10 layers of damage per spike for a total of 500 damage per spike pile (700 with Bigger Stacks), making it extremely powerful for stockpiling spikes. Despite the name, but in accordance with the upgrade's description, the spikes are not actually permanent. The spikes last between rounds and have a longevity of 3 rounds each or 300 seconds, whichever comes first.
It costs $25,500 on Easy, $30,000 on Medium, $32,400 on Hard, and $36,000 on Impoppable.
- Always purchase this upgrade on single-entry or single-exit maps near the end of the track. Then, spikes won't be used up immediately, allowing spike stockpiling to slowly make the tower more and more valuable.
- It is recommended to purchase the Path 2 Upgrades (Faster Production and Even Faster Production) over the Path 1 Upgrades (Bigger Stacks and White Hot Spikes) as Bigger Stacks only increases its pop count per spike from 500 to 700.
- Overclock works exceptionally well with Perma-Spike and more when paired with Stronger Stimulant. In fact, it is still slow enough not to consume Alchemist buffs faster than can be re-supplied.
- Note that leaving the game and re-entering will no longer erase the spike piles as of Version 12.0. Interestingly, Long Life Spikes and Deadly Spikes spike piles can be erased.
- Be cautious of using Snowstorm, as Perma-Spike without White Hot Spikes (or using an MIB) cannot affect frozen MOABs, allowing them to cross Perma-Spike undamaged, especially if using 'smart' targeting, where all spikes end up in one pile. Note that Acidic Mixture Dip cannot grant frozen-popping, despite granting lead-popping.
- Due to the nature that occasional server reconnections may be caused by the extreme lag on the device, even if the spike piles can be saved, it is better off not using Perma-Spike for Co-Op Mode.
- Main article: Perma-Spike/Strategies
The above page contains in-depth information on how to use Perma-Spike, and also includes a very useful list of towers that synergise with Perma-Spike.
Perma-Spike price increased ($22000 → $25000).
Perma-Spike fire rate decreased by 66%.
Permaspike with Bigger Stacks now has larger stacks (60 --> 70; effectively now up to 700 damage per spike pile for Permaspike with Bigger Stacks)
- Perma-Spike duration decreased from 350s-> 300s
- Perma-Spike price increased from 25k to 30k
- Perma Spike max rounds reduced from 4 -> 3
- Perma-Spike spike piles can now be saved (i.e. on any type of game save, including Co-Op saves)
Perma-Spike now attacks 4x as fast for the first 2.5s of a round.
- This is one of the few towers that can destroy a B.A.D. singlehandedly if given lead popping power and sufficient time to stack its spikes. The other towers are the Legend of the Night, The Anti-Bloon, Ezili with her level 20 ability, the Apache Prime upgraded with the 2nd path, the Sun Temple and True Sun God if given sufficient sacrifices.
- Between Version 2.0 and 11.2, a 0-2-5 can achieve a spike pile that can store around 65,000 pops worth of spikes if allowed to create a full stack.
- The description of the upgrade says "Spikes become almost permanent!", however, they only last about 3 rounds or 5 minutes, whichever is sooner.