Health and Damage

This is a HUGE mechanic that was introduced by Meta7.

In BTD6

 * 1) Monkey Engineer Buildings and Monkey towers all have 10 HP. However, sentry guns and Dispense-o-matics take a boatload more damage from projectile weapons (e.g. S.P.I.C.A./A.R.I.A. star showers, Commando Bloon cannonballs, C.O.D. knives) and explosives (e.g. B.L.I.T.Z. Missiles, Blooninja flash bombs, Mad Bomber grenades) than Monkeys.
 * 2) Machines (e.g. Bomb Towers, Tack Shooters, Bloonchippers) and Ice Towers have 15 HP.
 * 3) Vehicles have 20 HP, but Monkey Aces suffer more damage from energy weapons (e.g. Apopalypse or Chaos Bloon thunderbolts, W.T.H.B.O.O.M. lasers) than other vehicles.
 * 4) Buildings (e.g. Mortar Towers, Dartling Guns, Monkey Villages, Hospitals) have 40 HP, but Otaku Shelters take half damage from explosives.
 * 5) Giant Buildings (e.g. Temples of the Monkey God, Bloonsday Devices, Monkey Towns, M.I.B.s, Banana Research Facilities) have 100 HP.

In Bloons III

 * 1) All Players have 10 HP. All attacks do 1 HP to other players.
 * 2) (upcoming) Boss attacks average at 5HP.