Huge bombs deal greater damage in a large area and allow Frags to pop more Bloons.
~ BTD6 description
Really Big Bombs is the third upgrade of Path 1 for the Bomb Shooter in Bloons TD 6. It increases explosion radius by another +50% (from 18 to 27), does extra damage (from 2 to 3), and increases pierce (from 30 to 50). When crosspathed with Frag Bombs, fragments have +1 pierce (2 pierce), last longer, and have larger hitboxes.
Really Big Bombs serves mostly as a stepping stone towards Bloon Impact. It deals increased damage overall and therefore it can be used to reduce stronger non-MOAB-class bloons into weaker groups. Really Big Bombs is usually less favored over alternate options, especially Cluster Bombs, due to the latter being more versatile at cleaning up weaker groups of bloons rather than ripping open tougher layers as Really Big Bombs is designed to do.
Its main niche is to rip open groups of tougher bloon layers into weaker groups. The high damage packed into single large explosions can be used to split large groups of stronger bloons into multiple weaker clumps, where other towers can clean up the groups of weaker bloons spawned out from the parent bloons. Really Big Bombs explosions are quite large, but they are still smaller than the combined blasts of a Cluster Bombs with Bigger Bombs, and Cluster Bombs is more reliable at cleaning up bloons in general. The only aspect of Really Big Bombs that makes it stand out compared to alternate, more superior Bomb Shooter upgrades is how its explosions can pop Rainbow Bloons such that they do not spawn any Zebra Bloons or Black Bloons.
Really Big Bombs is roughly equivalent to Bloon Impact except without the stun benefits. As such, it can be used to wipe out stronger non-MOAB bloons with ease, specifically against Rainbow Bloons where it can bypass the black-immune layers.
Since Bloon Impact can not pop Black Bloons, multiple Really Big Bombs may be better at pure damage overall if there is already a Bloon Impact on the map for stunning.
Really Big Bombs makes a good stepping stone to the more powerful Bloon Impact, but alone it is generally not as good as a 2-0-3 Cluster Bombs, as it doesn't have the bonus range or bonus explosions that can inflict more DPS.
One advantage of Really Big Bombs compared to a 2-0-3 Cluster Bombs is that it can have both the benefits of Path 1 and Path 2, for the larger explosions and the faster attack speed. However, 2-0-3 Cluster Bombs usually performs better overall for a lower price.
The best crosspath for Really Big Bombs is 3-2-0, as this gives it faster attack speed to break down clumps of bloons at a faster rate and catch faster bloon waves more effectively. 3-0-2 improves fragments, but the fragments are too weak at cleaning up groups of bloons to be worthwhile compared to a faster rate of applying high-damage explosions.
Setting a Really Big Bombs on Close around a tight bend may be used to maximize the potential of the bigger explosions, as it can be used as a cheaper version of Ring of Fire that can pop Purples instead of Blacks.
Overall stronger than it did when it was first released, mostly due to Cluster Bombs fulfilling a similar role at a much cheaper cost. Really Big Bombs now specializes at producing high damage against dense groups of bloons with a single large explosion, which can compete versus the multiple clusters of smaller explosions as Cluster Bombs would specialize.
Cost of Really Big Bombs decreased ($1500 → $1200)
302 Bomb Shooter increases radius (i.e. hitbox) of frags from 2 → 3
302 Bomb Shooter increases pierce of frags from 1 → 2
302 Bomb Shooter increases lifespan of frags from 0.191s → 0.257s
Description changed from "Huge bombs blow up in a large area." to "Huge bombs blow up Bloons in a large area and allow Frags to pop more Bloons."
This was to mention Frag Bombs crosspathing.
We're really excited about the recent rise in Bomb fame, and we want to encourage this by buffing some of the detracting parts of Bomb Shooters. [...]
~ Ninja Kiwi
Really Big Bombs now deals more damage (2 → 3). Does not affect Bloon Impact.
Pierce of Really Big Bombs increased (48 → 50)
Description changed from "Huge bombs blow up Bloons in a large area and allow Frags to pop more Bloons." to "Huge bombs deal greater damage in a large area and allow Frags to pop more Bloons."
Crosspathing in BTD6 (top path 2, bottom path 3)
3-2-0 Really Big Bombs in a different perspective (only possible via hacking)
Really Big Bombs shooting a big red bomb
Really Big Bombs explosion
3-0-2 Frags with the Fraggy Frags MK. Some of the frags either collided with walls or reached pierce cap.
Really Big Bombs projectile
Really Big Bombs fragments from 3-0-2 crosspath
Really Big Bombs became the second upgrade to cost $1200 on Medium, the first being Ultravision.