On-Track is an attack style characterized by an attack going on directly onto the track and staying there for a specific amount of time where the bloons will go over it. It is part of the damage types family. Any attack that is On-Track will only affect a specific part of the track.
On-Track is represented on Bloons Wiki as 
, the upgrade icon for Smart Spikes in Bloons TD 6, as this depicts a trio of spikes targeted within proximity of a square target reticle.
Towers or upgrades must be in range of the track in order to exercise this attack style.
On-Track is core element of Spike Factories as they have this attack style as a base tower.
Categorization cases[]
All attacks that are considered On-Track:
- All Spike Factories have On-Track by default and will guarantee have this property.
- Bloon Trap is considered On-Track.
- Wall of Fire is considered On-Track.
- The Bloon Solver and Bloon Liquefier's glue blobs are considered On-Track.
- Necromancer: Unpopped Army's undead bloons are considered On-Track as long as Necromancer has undead bloons in its graveyard.
- Caltrops is considered On-Track.
- Acid Pools is considered On-Track.
- Cleansing Foam is considered On-Track.
- Gwendolin's Cocktail of Fire is considered On-Track.
- Obyn Greenfoot's Brambles and Wall of Trees is considered On-Track.
- Sauda's Leaping Sword on-track sword is considered On-Track as long as there is at least 1 bloon on the screen for the leaping attack to target onto.
- Ezili's Sacrificial Totem is considered On-Track.
- Geraldo's Stack of Old Nails, Tube of Amaz-o-Glue and Blade Trap are considered On-Track.
- Road Spike, Glue Trap, MOAB Mine and Camo Trap are powers that are considered On-Track.
Attacks that resemble On-Track but are not true On-Track:
- Quincy's Storm of Arrows is not considered On-Track since the arrows last until they hit the ground.
- Icicles is not considered On-Track as the shards appear only as a result of bloons being frozen.
