For other uses, see Knockback (disambiguation).

Knockback is a projectile behavior in the Bloons TD series that causes Bloons to move slower, stop moving, or move backwards on the track for a short time. It first appeared in Bloons TD 6 and also appears in Bloons TD Battles 2 and Bloons Adventure Time TD. It is similar to slowing, except it can apply a negative multiplier to cause Bloons to move backwards.

Knockback effects typically apply different speed modifiers to different types of Bloons. These are categorized into "Heavy" Bloons (Lead Bloons and Ceramic Bloons), MOAB-Class Bloons, and "light" Bloons (every other Bloon type). They cannot affect BADs or Boss Bloons, and some knockback effects cannot affect MOAB-Class Bloons at all.

Sources of knockback

Item Speed multipliers Duration Notes
Light Heavy MOAB-Class
Beauteous Wings -1× 0.1× 1.25 seconds
Butt Push -1× 0.1× 0.5× 2 seconds Affects BADs.
Little Dude -1× 0.1× 0.5 seconds
Shield Bash -1× 0.1× 0.5× 0.25 seconds
Time Bomb -1× 3 seconds
Train Boss -0.5× -0.5× -0.1× 2 seconds Duration increases to 4 seconds with the Unstoppable Force upgrade.

See also