Spiked Balls dealing extra damage to both Fortified MOABs and Fortified Ceramics
Extra Damage to Fortified is a projectile behavior characterized by dealing more damage than that tower's base damage to Fortified Bloon properties per hit. It is part of the damage types family.
Extra Damage to Fortified is represented on Bloons Wiki as 
, the upgrade icon for Spiked Balls in Bloons TD 6, as it is among the few physical, non-acidic attacks to gain this property outside of Tier 5 upgrades or Heroes. Extra Damage to Fortified is simply a subset of Extra Damage 
. Typical examples with Extra Damage to Fortified include Spiked Balls, Perishing Potions versus Fortified MOAB-class, Deconstruction, and Heavy Shells.
All attacks require an upgrade to deal more than one damage to Fortified per hit. Heroes can gain Weak Point to deal +1 damage to Fortified by default.
Towers that gain Extra Damage to Fortified[]
BTD6[]
Does not include towers that only deal Defortify 
or Defortify Blimp 
.
- Heroes:
- Captain Churchill at Level 15+
- Sauda Level 19+
- Geraldo's Nail Mines, both spikes and explosion when Level 16+
- Adora Level 9+ (Version 33.0)
- Towers:
- Juggernaut and Ultra-Juggernaut (Version 34.0)
- Heavy Shells and subsequent upgrades
- Perishing Potions against Fortified MOAB-class
- Spiked Balls and subsequent upgrades
- Deconstruction and subsequent upgrades
Buffs:
- Geraldo's Jar of Pickles when at Level 11 or above
Heroes:
Formerly Extra Damage to Fortified:
- Glaive Lord's Orbital Glaives (Version 24.0 - 41.0)
