Some classes are known smokers: the Spy and the Soldier. This increases to 6 with some hats (to be exact, the classes are the Demoman, the Sniper, the Soldier, and the Medic). The Pyro carries a lighter, but probably for a differentreason.
When the Engineer is gibbed with the Gunslinger equipped, his right hand will still be the normal gloved hand.
Similarly, if a player wearing an unlockable hat is gibbed, the regular hat gib may still spawn.
The Horseless Headless Horsemann's Head and the Saxton Hale Mask have an unspecified bonus. Specifically, they protect against the Horsemann's Scare taunt.
The Horseless Headless Horsemann doesn't do damage in the normal way. His attacks are treated as environmental kills, much like getting run-over by a train in other maps or falling down a pit. You can see this if you look at the console after he kills people. The coding for such a death, Horsemann's axe included, hits you for twice your current health; this prevents his attacks from being survivable in most normal ways.
According to his YouTube channel, Nathan Vetterlein (voice of the Scout) claims he's actually terrible at Scout, and prefers to play Heavy.
Trivia Tropes used:
Fake Nationality: None of the characters is of the same nationality and region as their voice actor, except maybe the Pyro.
Chet Falizek, writer: We wanted to make it sound like what Americans in the '60s would have imagined these people sounded like, not what they actually sounded like.
A Demoman wielding his melee weapon and shield is referred to as a "Demoknight" or "Sword and Board". "Targelander" and "Targe Demo" are also considered acceptable parlance for one with the Chargin' Targe and Eyelander. Likewise, a Demoman with a frying pan, Bounty Hat, shutter shades, and targe is called a Demopan.
Bitter players have taken to calling the Pyro "W+ M1" (forward movement + attack) due to the (alleged) notion that the only thing you need to do to win as Pyro is charge forward.
Pick the Huntsman as your primary and prepare for the barrage of "Cuntsman", "Huntspam", or "Lucksman".
Same for "Fail-a-Nature" for Force-a-Nature.
The FaN is also sometimes called the "FaG."
The FaN is also known as the Force-a-Knockback.
The Direct Hit has been called the "Direct Shit" on occasion for its general lack of effectiveness in all but the right hands.
In similar fashion, the Loch-and-Load has become the "Lucks-and-Lolz" to some for its similar directy-hit-only damage style.
A Soldier with the Frying Pan and Stainless Pot may be called a Kitchen Warrior.
A Pyro with the Gas Jockey's Gear set and Detonator is a Det Jockey, while one with that set and the Flare Gun is a Flare Jockey.
An Engineer with the Frontier Justice and Gunslinger is a Revengineer, named for his ability to deploy Mini-Sentries quickly, get some kills, then kill opponents with "revenge crits" after the sentry has been destroyed.
Before the Enforcer's nerf, Spies that used the Enforcer and the Dead Ringer were known as Dr. (Dead Ringer) Enforcer Spies, since the Dead Ringer completely negated the Enforcer's original weakness.
When the Spy-cicle was released, Spies that used the Dead Ringer, the Enforcer, and the Spy-cicle were known as Dr. Enforcicle Spies, since the Spy-cicle had incredible synergy with the Enforcer and the Dead Ringer. This too died down with the Enforcer's nerf.
Heavies that use Shotgun or Family Business as their main weapon rather than their miniguns are called "Fat Scouts".
God Never Said That: It's commonly believed that every member of 1850's BLU team is a notable historical figure, but makani clarifies that the Medic and Soldier are not intended to be Sigmund Freud and Stonewall Jackson.
Sniper: John Patrick Lowrie does Sniper and most of the random male characters in Half-Life 2. And he's married to Ellen McLain, who does the Announcer. Definitely Valve's go-to couple — one or the other of them has been in every game Valve's put out since HL2.
The game itself underwent many, many, MANY different iterations before the development team settled on the current gameplay and visual design. (For example, it was originally pitched as a combination FPS/RTS with a realistic art style, with a class specializing in commanding the other units around somehow.)
There were a few items and weapons that were scrapped during development. There was a tranquilizer gun for the Spy and the Scout was originally given the Sniper's SMG. The Scout was also planned on getting a nail gun which would have behaved similarly to the Medic's syringe gun. There was an item for the Engineer called the "repair node" which was also scrapped.
Character design similarly had a lot of changes:
The Heavy once had a mullet.
The Medic, Engineer, and Spy wore their class badges on armbands.
The Scout's apparent age and toughness bounced all over the place.
The Demoman was just plain stereotypical Scottish (kilt and all).
The Soldier looked more like he actually fought in the army.
Another original idea was too have the game's art style looking similar to stop-motion animation or "claymation". This idea later led to the animation style the current game has.
There were a few more ideas for Meet the Medic which didn't make it in due to killing the pacing and/or it not really meshing with The Verse's general aesthetic (BLU Spy's still living severed head is a nod to one of the scrapped ideas). Finally, they settled on THE iconic image (a Medic ‹berCharging a Heavy) and built the story around that.
Meet the Sandvich had many scrapped lines. Some of which are:
Scout: Give me back my leg bone! *whack* Don't hit me with it!
Soldier: You cannot hurt me! Pain does not hurt! *crack* I stand corrected!
Scout: He's like a bear! He's like a big, shaved bear that hates people!
When thinking of what song in "Meet the Pyro" to play in Pyroland, one suggestion was Tiny Tim's "Living in the Sunlight, Loving in the Moonlight"—a song probably best known nowadays for its use in the Spongebob Squarepants pilot.
Grenades in the style of Team Fortress Classic were almost implemented in the final version of Team Fortress 2, but were taken out, due to the imbalance they posed.
Woolseyism: In the French dub of Meet the Soldier, the line "Unless it's a farm!" was translated as "Farms don't count!"
In the Spanish translation of the game, Jarate is called "Fraskungfu" ("frasco" being Spanish for "jar")