Healing Factor

"Regrow bloons will grow back layers much faster during this game."

- BATTD description

Healing Factor is a rule in Martian Games. It is always paired with Heartstopper, just like its difficulty modifier counterpart. When this rule is active, Regrow Bloons regrow layers TBAx faster.

Strategy
Healing Factor generally is not much of an issue for a rule if the player has defenses that are sufficiently fast enough to clear out Regrow Bloons.