Slowdown

“

Shoot, son, you all slow as molasses. Click to listen — The Engineer

”

Slowdown, or slow for short, is a gameplay mechanic that decreases the speed of a player for a set amount of time. This effect can be applied to a player when under attack by certain weapons or as a penalty for using a certain item. In addition, players' movement speed is naturally slowed to 90% of their base speed while running backwards and to 33% while crouching. (See Classes for specifics on how much each class is slowed.)

The slowdown effect has no falloff distance; players hit from any distance will always be slowed down by at least a small amount.

Weapon effect

List of slowdown-inflicting weapons
Scout	Melee		The Sandman's secondary fire launches a baseball that can slowdown the target for several seconds. The target is slowed down for the duration of the effect based on distance.
		Sandman
Heavy	Primary		On Hit: 100% chance to slow target. Every bullet that hits the target slows them to approximately 113 Hammer units per second. Differences in class or normal running speed does not change this figure. The slowdown effect is reduced based upon the target's distance, gradually becoming less effective from 512 to 1536 Hammer units away, where it no longer slows the target at all. Disguised Spies and enemies that are being healed by a continuous source of healing are not affected by slowdown from this weapon.
		Natascha
Note		Includes Festive, Botkiller, and Australium variants.

Weapon penalty

List of slowdown penalty weapons
Scout	Primary			Movement speed is reduced to 120% while equipped in the loadout. Speed increases as up to 99 damage is done without air jumping or getting damaged.
		Baby Face's Blaster
	Secondary			Applies a slowdown effect for 5 seconds to the player after phasing wears off, based on the amount of damage they absorbed. Speed decreased by -25% at low damage, to -50% at 200+ damage.
		Bonk! Atomic Punch
Soldier	Primary			Movement speed reduced to 27% while charging.
		Cow Mangler 5000
Demoman	Melee			Movement speed reduced to 79% while deployed.
		Scotsman's Skullcutter
Heavy	Primary			Movement speed is reduced to 37% while spun up.
		Minigun	Iron Curtain
		Natascha	Tomislav
		Huo-Long Heater
				Movement speed is reduced to 14.66% while spun up.
		Brass Beast
Engineer	Building			Movement speed is reduced to 90% while hauling a building.
		Hauling
Sniper	Primary			Movement speed is reduced to 27% while zoomed in with a scope.
		Sniper Rifle	AWPer Hand
		Machina	Shooting Star
		Bazaar Bargain	Sydney Sleeper
		Hitman's Heatmaker
				Movement speed is reduced to 45% while an arrow is drawn.
		Huntsman	Fortified Compound
				Movement speed is reduced to 27% while charging.
		Classic
Spy	PDA			Movement speed is reduced if disguised as a class slower than the Spy: 100% if disguised as a Pyro, Engineer, or Sniper 93% if disguised as a Demoman 80% if disguised as a Soldier 77% if disguised as a Heavy
		Disguise Kit
Note		Includes Festive, Botkiller, and Australium variants.

Environmental slowdowns

List of environmental slowdowns
Ghost Horseless Headless Horsemann		On certain Halloween maps, one or more ghosts occasionally haunt certain areas of the map. Any players who get near or come into contact with these ghosts are frightened and have their movement speed reduced in addition to being unable to fire any weapons, much like when stunned. The Horseless Headless Horsemann can scream and inflict a similar effect on all players nearby. On certain Halloween maps, players change to ghosts when they die in the end-round Underworld. Ghost players do not scare other players as non-player ghosts do.
	Scared