Fortified Bloons are a type of Bloon Modifier in Bloons TD 6. This property can be applied to Lead Bloons, Ceramic Bloons, MOAB-Class Bloons, and Golden Bloons. Fortified Bloons require more damage to pop than their non-Fortified counterparts: Fortified Leads take 4 damage to pop, while fortified Ceramic and MOAB-Class Bloons take twice as much damage to pop. If a Fortified Bloon degrades to a layer that cannot be Fortified, its children will not be Fortified (e.g. popping a Fortified Ceramic will spawn two non-Fortified Rainbow Bloons), and Fortified Regrow Bloons will not regenerate their Fortified properties if they regrow to their initial layers.
While not technically a Fortified Bloon, Diamondback's Rattle Tail is treated as Fortified by attacks that do more damage to Fortified Bloons.
Few attacks and buffs output more flat damage to Fortified compared to non-Fortified. Generally speaking, bonus Fortified damage is helpful but not to the point of being able to have it revolved around.
Related achievements
5M
Sapper Pop 5,000,000 Fortified Bloons or MOAB-Class. Avoid insta-kills and Fort stripping for best results. Reward(s): 500, 1
3K
Crash of the Titans Strip the fortifications from Fortified DDTs 3000 times Reward(s): 300, 0-0-4 Mortar Monkey
Quotes
“
What's this? These Bloons have extra armor making them even tougher to pop! — Tutorial
500, 
1
0-0-4 Mortar Monkey
Fortified Lead Bloon
Fortified Ceramic Bloon
Fortified MOAB
Fortified BFB
Fortified ZOMG
Fortified DDT
Fortified BAD
Fortified Lead Golden Bloon
Fortified Red Bloon
Fortified Blue Bloon
Fortified Green Bloon
Fortified Yellow Bloon
Fortified Pink Bloon
Fortified Black Bloon
Fortified White Bloon
Fortified Purple Bloon
Fortified Zebra Bloon
Fortified Rainbow Bloon
