Template:List of weapons without random but with situational crits

List of weapons unable to deal random crits but able to deal situational crits
Scout	Secondary		Will critical hit against enemies who have been stunned and will mini-crit at long distances. The bleeding on a stunned target will also deal critical hits.
		Flying Guillotine
Soldier	Melee		Deals critical damage while the Soldier wielding it is rocket jumping.
		Market Gardener
Pyro	Primary		Guaranteed to crit from behind.
		Backburner
			Gradually fills a "Mmmph" meter as fire damage is done, allowing a Pyro to begin a guaranteed 10-second crit period when full. This boost only affects the Phlogistinator.
		Phlogistinator
	Secondary		Accrues a critical hit each time it is used to extinguish a teammate.
		Manmelter
	Melee		Will score a critical hit if the victim is on fire. It may still randomly perform a crit animation, but will not inflict crit damage unless the enemy is burning.
		Axtinguisher
		Postal Pummeler
			Сrits against wet enemies. This includes those who are in or have recently emerged from a source of water, and those coated in Jarate or Mad Milk.
		Neon Annihilator
Engineer	Primary		Accrues 2 Revenge Crits for every kill and 1 for every assist made by the user's Sentry Gun once the Sentry is destroyed.
		Frontier Justice
	Melee		Will perform a critical punch on a third successful consecutive punch, causing a different kill icon.
		Gunslinger
Sniper	Primary		Automatically score critical hits on successful headshots. Rifles can only perform headshot crits while scoped.
		Sniper Rifle
		Bazaar Bargain
		Machina
		Hitman's Heatmaker
		AWPer Hand
		Huntsman
	Secondary		Will grant 3 seconds of crit boost upon killing an enemy.
		Cleaner's Carbine
Spy	Primary		Automatically score critical hits on successful headshots. Only when at full accuracy.
		Ambassador
			Will store one critical hit for every enemy building destroyed with a Sapper placed on it by the user.
		Diamondback
Note		The Spy's melee weapons always and only crit on backstabs, boosting the damage of a backstab from 2x the victim's current health to 6x. Knives can still be forced to crit, but this will only result in triple the melee damage, not backstab damage.