MOAB SHREDR

"Super-Hard-Rending-Engine-Driven-Razors shred MOAB-Class Bloons."

- In-game description

 is the Tier 3 upgrade for Path 2 for the Spike Factory in Bloons TD 6. All spikes from the Spike Factory now deal +4 damage to MOAB-class bloons, dealing up to 25 damage to a single MOAB-class bloon per 5-spike pile. Unlike its Bloons TD 5 Counterpart upgrading to the MOAB SHREDR upgrade does not grant the Spike Factory with a substantial attack speed bonus but its compensated with a much greater damage bonus versus MOAB-class plus a considerably lower price tag.

It costs $2,125 on Easy, $2,500 on Medium, $2,700 on Hard, and $3,000 on Impoppable.

Strategy
MOAB SHREDR excels most at MOAB damage, but due to the nature of its attack, it requires time to build up its spikes and specific usage to prevent its spikes from being wasted on bloons, which it deals no extra damage to. This makes it difficult to use to its maximum potential.

Unlike most Spike Factory upgrades, it is often useful to place the MOAB SHREDR near the entrance to deal very high damage against MOABs that are entering the map as there's little to no point stockpiling the spikes due to resulting children.

Therefore, it is generally only used as MOAB damage on rounds where there are not a lot of regular bloons (most notably Round 40, 60, 80, 100, etc.), or as a stepping stone to Spike Storm.

Tips

 * It is almost always better off going for 2-3-0 than 0-3-2 MOAB SHREDR, because the larger spike piles massively increases the Spike Factory's overall popping power. In addition, the White Hot Spikes upgrade allows it to pop Lead Bloons and Frozen Bloons, and can be a big help against defeating DDTs.
 * 0-3-2 outputs more overall stockpile damage on longer maps, due to the much increased spike lifespan from Long Reach and the brief start-of-round attack speed bonus from Smart Spikes.
 * MOAB SHREDR deals far more DPS versus MOAB-class bloons for its cost than any other Tier 3 Spike Factory or below. Even when a 0-3-0 MOAB SHREDR is compared to a 3-2-0 Spiked Balls or a maxed out 0-2-3 Long Life Spikes, MOAB SHREDR ends up outbeating either two at simply MOAB-class damage. Bear in mind that the optimal Tier 3 Spike Factory competitors work better at tanking normal bloons, however.
 * It is sometimes viable to avoid the bloon children while wreaking havoc to MOAB-class bloons. If two pathways are very close to each other, the spikes may only get in contact with blimps, but not with the insides. A good example of this is the entrance and exit of Winter Park.

Trivia

 * MOAB SHREDR is the only upgrade in the entire franchise whose upgrade name consists of only capital letters and spaces. The IFR upgrade also consists of only capital letters and no lowercase letters, but there are no spaces in the name of the aforementioned upgrade.