Team Fortress 2

Steam achievements:
Complete the following tasks to unlock the corresponding Steam achievements.

Dynasty: Win 20 games.
Escape the Heat: Jump into a pool of refreshing water while on fire.
Flamethrower: Set five enemies on fire in 30 seconds.
Grey Matter: Get 25 headshots as a Sniper.
Hard to Kill: Get five kills in a row without dying.
Hardcore: Accumulate 1000 total kills.
Head of the Class: Play a complete round with every class.
Impenetrable Defense: Successfully defend Dustbowl without giving up a capture.
Impossible Defense: Successfully defend Gravel Pit without giving up a capture.
Lightning Offense: Win Well in 5 minutes or less.
Master of Disguise: Trick an opposing medic into healing you.
Nemesis: Get five revenge kills.
Powerhouse Offense: Win 2Fort with a shutout.
Relentless Offense: Win Hydro without giving up a capture.
Sentry Gunner: Accumulate 10 sentry gun kills with a single turret.
Team Doctor: Accumulate 25000 heal points as a Medic.
With Friends Like these...: Play in a game with 7 or more players from your friends list.
World Traveler: Play a complete game on 2Fort, Dustbowl, Granary, Gravel Pit, Hydro, and Well (CP).
Ambassador: Unlock 5 Spy Achievements.
Axtinguisher: Unlock 22 Pyro Achievements.
Backburner: Unlock 16 Pyro Achievements.
Blutsauger: Unlock 10 Medic Achievements.
Bonk! Atomic Punch: Unlock 22 Scout Achievements.
Buff Banner: Unlock 17 Soldier Achievements.
Chargin' Targe: Unlock 5 Demoman Achievements.
Cloak and Dagger: Unlock 11 Spy Achievements.
Dead Ringer: Unlock 17 Spy Achievements.
Direct hit: Unlock 11 Soldier Achievements.
Equalizer: Unlock 5 Soldier Achievements.
Eyelander: Unlock 11 Demoman Achievements.
Flare gun: Unlock 10 Pyro Achievements.
Force-A-Nature: Unlock 10 Scout Achievements.
Frontier Justice: Unlock 5 Engineer Achievements.
Gunslinger: Unlock 11 Engineer Achievements.
Huntsman: Unlock 5 Sniper Achievements.
Jarate: Unlock 11 Sniper Achievements.
Killing Gloves of Boxing: Unlock 20 Heavy Achievements.
Kritzkrieg: Unlock 16 Medic Achievements.
Natascha: Unlock 15 Heavy Achievements.
Razorback: Unlock 17 Sniper Achievements.
Ready for Duty: Complete each class to unlock the next.
Riftwalker: Kill an enemy within 5 seconds of you traveling through an Engineer's teleporter.
Sandman: Unlock 16 Scout Achievements.
Sandvich: Unlock 10 Heavy Achievements.
Scottish Resistance: Unlock 17 Demoman Achievements.
Ubersaw: Unlock 22 Medic Achievements.
Wrangler: Unlock 17 Engineer Achievements.

Complete the following tasks to as a engineer class unlock the corresponding Steam achievements. New weapons will become unlocked after attaining various numbers of achievements.

(Not So) Lonely are the Brave: Keep a Heavy healed with your dispenser while he makes five kills.
Battle Rustler: Teleport 100 team members into battle.
Best Little Slaughterhouse in Texas: Rack up 5000 kills with your sentry guns.
Breaking Morant: Kill 10 Snipers with a sentry gun under the control of your Wrangler.
Building Block: Have a sentry shielded by the Wrangler absorb 500 damage without being destroyed.
Built To Last: Help a single building take over 2000 damage without being destroyed.
Circle the Wagons: Repair 50,000 damage to friendly buildings constructed by other players.
Death Metal: Pick up 10,000 pieces of waste metal from destroyed buildings.
Deputized: Get 10 kills with another Engineer where a sentry gun was involved in the kill.
Doc Holiday: Have a dispenser heal three teammates at the same time.
Doc, Stock, and Barrel: Repair a sentry gun under fire while being healed by a Medic.
Drugstore Cowboy: Have dispensers you built dispense a combined amount of 100,000 health over your career.
Fistful of Sappers: Destroy 25 sappers on buildings built by other team members.
Frontier Justice: Within 10 seconds, have your sentry kill the enemy that just killed you.
Git Along!: Manage to get to, and then remove, a sapper placed on your building while you were several meters away.
Honky Tonk Man: Smash an enemy player's head in with your guitar.
How the Pests was Gunned: Destroy 50 enemy stickybombs lying in range of friendly buildings.
If You Build It, They Will Die: Haul a level 3 sentry gun into a position that achieves a kill shortly after being redeployed.
Land Grab: Help a team member construct a building.
No Man's Land: Use a sentry gun to kill 25 enemy players trying to capture a point.
Patent Protection: Destroy an enemy Engineer's sentry gun with a sentry under control of your Wrangler.
Pownd on the Range: Kill 10 enemies outside the normal sentry gun range using the Wrangler.
Quick Draw: Kill a spy and two sappers within 10 seconds.
Revengineering: Use a revenge crit to kill the enemy player that destroyed your sentry gun.
Rio Grind: Perform 50 repairs and/or reloads on a sentry gun being Wrangled by another Engineer.
Search Engine: Kill three cloaked Spies with a sentry gun under control of your Wrangler.
Silent Pardner: Upgrade 50 buildings built by other team members.
Six-String Stinger: Provide an enemy player with a freeze cam of your guitar playing skills.
Texas Ranger: Haul buildings one kilometer over your career.
Texas Two-Step: Use your shotgun to finish off an enemy recently damaged by your sentry gun.
The Extinguished Gentleman: Have dispensers you built extinguish 20 burning players.
The Wrench Connection: Kill a disguised spy with your Wrench.
Trade Secrets: Kill 20 players carrying the Intelligence.
Uncivil Engineer: Provide an enemy player with a freeze cam of you and the sentry that just killed them.
Unforgiven: Kill three enemies with revenge crits without dying.

Complete the following tasks to as a heavy class unlock the corresponding Steam achievements. New weapons will become unlocked after attaining various numbers of achievements.

0wn the Means of Production: Remove 20 stickybombs by killing the Demomen who produced them.
Borsht Belt: Kill 10 Heavies with The K.G.B
Class Struggle: Work with a friendly Medic to kill an enemy Heavy & Medic pair.
Communist Mani-Fisto: Kill an enemy with a critical punch.
Crime and Punishment: Kill 10 enemies carrying your intelligence.
Crock Block: Survive a direct hit from a critical rocket.
Division of Labor: Kill 10 enemies with a Medic assisting you, where neither of you die.
Don't Touch Sandvich: Kill 50 Scouts using Natascha.
Factory Worker: Kill 20 enemies while being recharged by a dispenser.
Five Second Plan: Kill an enemy in the first 5 seconds after you exit a teleporter.
Gorky Parked: Kill 25 enemies while you're standing on a control point you own.
Heavy Industry: Fire $200,000 worth of minigun rounds in a single life.
Heavy Milestone 1: Achieve 10 of the achievements in the Heavy Pack
Heavy Milestone 2: Achieve 16 of the achievements in the Heavy Pack
Heavy Milestone 3: Achieve 22 of the achievements in the Heavy Pack
Icing on the Cake: Get 20 kills on players that you're dominating.
Iron Kurtain: Take 1000 points of damage in a single life.
Kollectivization: Get 1000 assists.
Konspicuous Konsumption: Eat 100 sandviches.
Krazy Ivan: Kill 100 enemies while both you and your victim are underwater.
Lenin a Hand: Help 5 teammates get revenge on their nemeses.
Marxman: Kill 10 enemies in mid-air with the minigun.
Party Loyalty: Kill 50 enemies within 3 seconds of them attacking your medic.
Permanent Revolution: Kill 5 enemies without spinning down your gun.
Photostroika: Provide an enemy with a freezecam shot of you taunting while invulnerable.
Purge: Kill 15 enemies capturing a control point you own.
Pushkin the Kart: Get 50 caps on payload maps.
Rasputin: In a single life, get shot, burned, bludgeoned, and receive explosive damage.
Rationing: Kill an enemy with your shotgun while you're out of minigun ammo.
Red Oktoberfest: Earn a domination for a Medic who;s healing you.
Redistribution of Health: Heal 1000 damage with med-kits in a single life.
Show Trial: Kill an enemy with a taunt.
Soviet Block: While invulnerable and on defense, block an invulnerable enemy Heavy's movement.
Soviet Union: Get 25 enemy kills where you either assist or are assisted by another Heavy.
Spyalectical Materialism: Kill or assist in killing 10 cloaked Spies.
Stalin the Kart: Block the enemy from moving the payload cart 25 times.
Supreme Soviet: Get UberCharged 50 times.
Vanguard Party: Be the first on your team to start capturing a control point in a round.

Complete the following tasks to as a medic unlock the corresponding Steam achievements. New weapons will become unlocked after attaining various numbers of achievements.

Autoclave: Assist in burning 5 enemies with a single ÜberCharge on a Pyro.
Autopsy Report: Provide an enemy with a freezecam shot of you taunting above their ragdoll.
Bedside Manner: Be healing a teammate as he achieves an achievement of his own.
Big Pharma: Assist a Heavy in killing 20 enemies, where neither of you die.
Blast Assist: Assist in exploding 5 enemies with a single ÜberCharge on a Soldier.
Blunt Trauma: Assist in punching 2 enemies with a single ÜberCharge on a Heavy.
Chief of Staff: Accumulate 1 million total heal points.
Consultation: Assist a fellow Medic in killing 3 enemies in a single life.
Doctor Assisted Homicide: Assist in killing 20 nemeses.
Does It Hurt When I Do This?: Kill 50 Scouts with your syringe gun.
Double Blind Trial: Deploy an ÜberCharge within 8 seconds of a nearby enemy Medic deploying his.
Family Practice: ÜberCharge five of your Steam Community Friends.
First Do No Harm: Play a full round without killing any enemies, and score the highest on a team of 6 or more players.
FYI I am A Medic: Use your bonesaw to kill 1 Spy who has been calling for 'Medic!'.
Grand Rounds: Heal 200 teammates after they've called for 'Medic!'.
Group Health: Work with 2 other Medics to deploy 3 simultaneous ÜberCharges.
House Call: Join a game that one of your friends is in and then deploy an ÜberCharge on him.
Hypocritical Oath: Kill an enemy Spy that you have been healing.
Infernal Medicine: Extinguish 100 burning teammates.
Intern: Accumulate 7000 heal points in a single life.
Medic Milestone 1: Achieve 10 of the achievements in the Medic pack.
Medic Milestone 2: Achieve 16 of the achievements in the Medic pack.
Medic Milestone 3: Achieve 22 of the achievements in the Medic pack.
Medical Breakthrough: Assist in destroying 5 enemy Engineer buildings with a single ÜberCharge on a Demoman.
Medical Intervention: Save a falling teammate from dying on impact.
Midwife Crisis: Heal an Engineer as he repairs his Sentrygun while it's under enemy fire.
Peer Review: Kill 10 Medics with your bone saw.
Placebo Effect: Kill 2 enemies in a single life, while having your ÜberCharge ready, but undeployed.
Play Doctor: In a team with no Medics, be the first person to switch to Medic after a teammate calls for 'Medic!', and then heal 500 health.
Preventive Medicine: Block the enemy from capturing a control point with an ÜberCharged teammate.
Quadruple Bypass: Heal a teammate who's taking fire from 4 enemies at once.
Sawbones: Hit enemies with your bonesaw 5 times in a row without dying or missing.
Second Opinion: ÜberCharge 2 teammates at once.
Specialist: Accumulate 10000 heal points health in a single life.
Surgical Prep: Have an ÜberCharge ready before the Setup phase ends.
Trauma Queen: Deploy 3 ÜberCharges in less than 5 minutes, and assist in 5 kills during that time.
Triage: Deploy an ÜberCharge on a teammate less than a second before they're hit by a critical explosive.
Ubi concordia, ibi victoria: Assist in killing 5 enemies on an enemy control point, in a single life.
You'll Feel a Little Prick: Assist in killing 3 enemies with a single ÜberCharge on a Scout.

Complete the following tasks to as a pryo class unlock the corresponding Steam achievements. New weapons will become unlocked after attaining various numbers of achievements.

Arsonist: Destroy 50 Engineer buildings.
Attention Getter: Ignite 100 enemies with the flare gun.
Baptism by Fire: Force 10 burning enemies to jump into water.
BarbeQueQ: Cause a dominated player to leave the server.
Burn Ward: Ignite 3 medics that are ready to deploy an Uber-charge.
Camp Fire: Kill 3 enemies in a row, all within the same area.
Clearcutter: Kill 6 people with your axe in one life.
Combined Fire: Use your shotgun to finish off 20 players you've ignited.
Controlled Burn: Ignite 50 enemies capturing one of your control points.
Cooking the Books: Ignite 5 enemies carrying your intelligence.
Dance Dance Immolation: Kill 3 enemies while they're taunting.
Dead Heat: Kill an enemy in the same second that he kills you.
Fire and Forget: Kill 15 players while you're dead.
Fire Chief: Kill 1000 enemies
Firefighter: Kill 500 enemies.
Firewall: Ignite 5 Spies who have a sapper on a friendly building.
Firewatch: Ignite 10 snipers while they are zoomed in.
Freezer Burn: Provide enemies with freezecam shots of each of your taunts.
Got A Light?: Ignite an enemy Spy while he's flicking a cigarette.
Hot on Your Heels: Kill 50 enemies with your flamethrower, from behind.
Hot Potato: Reflect 100 projectiles with your compressed air blast.
Hotshot: Kill a Soldier with a reflected critical rocket.
I Fry: Ignite 10 disguised Spies.
Lumberjack: Kill 3 people with your axe in one life.
Makin' Bacon: Kill 50 Heavies with your flamethrower.
Next of Kindling: Ignite an enemy, and the Medic healing him.
OMGWTFBBQ: Kill an enemy with a taunt.
Pilot Light: Ignite a rocket-jumping Soldier while he's in midair.
Plan B: Kill 10 enemies while you're both underwater.
Pyro Milestone 1: Achieve 10 of the achievements in the Pyro Pack.
Pyro Milestone 2: Achieve 16 of the achievements in the Pyro Pack.
Pyro Milestone 3: Achieve 22 of the achievements in the Pyro Pack.
Pyromancer: Do 1 million points of total fire damage.
Pyrotechnics: Kill 3 enemies in a single uber-charge.
Second Degree Burn: Kill a burning enemy who was ignited by another Pyro.
Spontaneous Combustion: Ignite 10 cloaked Spies.
Trailblazer: Ignite 10 enemies that have recently used a teleporter.
Weenie Roast: Have 2 enemy Scouts on fire at the same time.

Complete the following tasks to as a scout class unlock the corresponding Steam achievements. After getting 10 achievements you will unlock a new primary weapon. After getting 16 achievements you will unlock a new secondary weapon. After getting 22 achievements you will unlock a new melee weapon.

A Year to Remember: Get 2004 lifetime kills.
Artful Dodger: Dodge 1000 damage in a single life using your Bonk! Atomic Punch.
Batter Up: Perform 1000 double jumps.
Batting the Doctor: Kill a Medic that is ready to deploy an ÜberCharge.
Beanball: Stun a scout with their own ball.
Belittled Beleaguer: Kill an opposing player that has your intelligence while holding theirs.
Block the Plate: Block 50 point captures.
Brushback: Stun 50 enemies while they are capturing a point or pushing the cart.
Caught Napping: Kill 50 enemies from behind with the Force-A-Nature.
Closer: Destroy 3 teleporter entrances.
Doctoring the Ball: Kill 3 enemies while under the effects of a Medic's ÜberCharge.
Dodgers 1, Giants 0: Kill an enemy Heavy and take his Sandvich.
Fall Classic: Cause an environmental death or suicide using the Force-A-Nature's knockback.
First Blood: Get the first kill in an Arena match.
First Blood, Part 2: Kill 5 enemies with the First Blood crit buff.
Foul Territory: Cause an environmental death by stunning an enemy.
Gun Down: Destroy an active sentry gun using your pistol.
I'm Bat Man: Survive 500 damage in one life.
If You Build It: Destroy 3 enemy buildings while they are still under construction.
Moon Shot: Stun an enemy for the maximum possible duration by hitting them with a long-range ball.
No Hitter: Steal and then capture the enemy intelligence without firing a shot.
Out of the Park: Bat an enemy 25 meters.
Pop Fly: Kill 20 players while double-jumping.
Quick Hook: Kill a player in Well before the round starts.
Race for the Pennant: Run 25 kilometers.
Retire the Runner: Kill a Scout while they are snared by the post-dodge slowdown effect.
Round Tripper: Capture the enemy intelligence 25 times.
Scout Milestone 1: Achieve 10 of the achievements in the Scout Pack.
Scout Milestone 2: Achieve 16 of the achievements in the Scout Pack.
Scout Milestone 3: Achieve 22 of the achievements in the Scout Pack.
Set the Table: Initiate 10 point captures that ultimately succeed.
Side Retired: Capture the last point in a CP map.
Stealing Home: Start capping a capture point within a second of it becoming available.
Strike Zone: Kill 50 enemies while they are stunned.
The Big Hurt: Stun 25 ÜberCharged enemies.
The Cycle: In a single life, kill an enemy while you are on the ground, in the air, and in the water.
Triple Play: Capture three capture points in a row in one life.
Triple Steal: Capture the enemy intelligence 3 times in a single CTF round.

Complete the following tasks to as a sniper class unlock the corresponding Steam achievements. After getting 10 achievements you will unlock a new primary weapon. After getting 16 achievements you will unlock a new secondary weapon. After getting 22 achievements you will unlock a new melee weapon.

Australian Rules: Dominate an enemy Sniper.
Be Efficient: Get 3 kills with the Sniper Rifle without missing a shot.
Be Polite: Provide an enemy with a freezecam shot of you doffing your hat.
Beaux And Arrows: Kill a Heavy & Medic pair with the bow.
Consolation Prize: Get backstabbed 50 times.
De-sentry-lized: Destroy 3 Engineer sentry guns.
Dead Reckoning: Kill an enemy with an arrow while you're dead.
Dropped Dead: Kill a Scout in midair with your Sniper Rifle or the Huntsman.
Enemy At The Gate: Kill an opponent within the first second of a round.
Friendship Is Golden: Extinguish a burning teammate with your Jarate.
Have A Plan: Capture the flag in CTF.
Jarate Chop: Jarate and then kill 3 enemies with your Kukri.
Jarring Transition: Use Jarate to reveal a cloaked Spy.
Jumper Stumper: Kill a rocket or grenade-jumping enemy in midair with your Sniper Rifle or the Huntsman.
Kill Everyone You Meet: Kill 1000 enemies.
Kook The Spook: Kill 10 Spies with your Kukri.
My Brilliant Career: Top the scoreboard 10 times on teams of 6 or more players.
Not A Crazed Gunman, Dad: In a single life, kill 3 enemies while they are achieving an objective.
Number One Assistant: Score 5 assists with the Jarate in a single round.
Parting Shot: Headshot an enemy player the moment his invulnerability wears off.
Pincushion: Hit an enemy with 3 arrows, without killing them.
Rain On Their Parade: Jarate an enemy and the Medic healing him.
Robbin' Hood: Take down an intelligence carrier with a single arrow.
Rode Hard, Put Away Wet: Jarate an enemy that you're dominating.
Saturation Bombing: Jarate 4 enemy players with a single throw.
Self-destruct Sequence: Headshot 10 enemy Snipers.
Shafted: Stab an enemy with an arrow.
Shock Treatment: Kill a spy whose backstab attempt was blocked by your Razorback.
Shoot The Breeze: Kill a fully invisible Spy in a single hit.
Sniper Milestone 1: Achieve 5 of the achievements in the Sniper Pack.
Sniper Milestone 2: Achieve 11 of the achievements in the Sniper Pack.
Sniper Milestone 3: Achieve 17 of the achievements in the Sniper Pack.
Socket To Him: Headshot an enemy Demoman.
The Last Wave: Provide an enemy with a freezecam shot of you waving to them.
Triple Prey: In a single round, kill the same enemy with 3 different weapons.
Trust Your Feelings: Get 5 kills with the Sniper Rifle without your scope.
William Tell Overkill: Pin an enemy Heavy to the wall via his head.
Überectomy: Kill a Medic that is ready to deploy an ÜberCharge.

Complete the following tasks to as a spy class unlock the corresponding Steam achievements. After getting 10 achievements you will unlock a new primary weapon. After getting 16 achievements you will unlock a new secondary weapon. After getting 22 achievements you will unlock a new melee weapon.

A Cut Above: Kill a gun-wielding Spy with your knife.
Agent Provocateur: Backstab your Steam Community friends 10 times.
Burn Notice: Survive 30 seconds after being ignited while cloaked.
Come In From The Cold: Get a Revenge kill with a backstab.
Constructus Interruptus: Kill an Engineer who is working on a sentry gun.
Counter Espionage: Backstab a disguised Spy.
Deep Undercover: While using the Cloak and Dagger, kill the same enemy 3 times, all within the same area in a single life.
Die Another Way: Kill a Sniper after your backstab breaks his Razorback.
Diplomacy: Kill 50 enemies with the Ambassador.
Dr. Nooooo: Backstab a Medic that is ready to deploy an ÜberCharge.
For Your Eyes Only: Provide an enemy with a freezecam shot of you flicking a cigarette onto their corpse.
Fyi I Am A Spy: Backstab a Medic who has healed you in the last 5 seconds.
High Value Target: Backstab an enemy who is dominating 3 or more of your teammates.
Identity Theft: Backstab the enemy that you're currently disguised as.
Insurance Fraud: Kill an enemy while you're being healed by an enemy Medic.
Is It Safe?: Backstab 50 enemies who are capturing control points.
Joint Operation: Sap an enemy sentry gun within 3 seconds of a teammate sapping another.
May I Cut In?: Backstab an enemy and the Medic healing him within 10 seconds of each other.
On Her Majesty's Secret Surface: Start capping a capture point within a second of it becoming available.
Point Breaker: Kill 15 enemies who are standing on a control point they own.
Sap Auteur: Destroy 1000 Engineer buildings with sappers.
Sapsucker: Sap an enemy building, then backstab the Engineer who built it within 5 seconds.
Skullpluggery: Headshot 20 Snipers with the Ambassador.
Slash And Burn: Backstab an enemy, who then switches to Pyro before they respawn.
Sleeper Agent: Kill an enemy who triggered your feign death in the last 20 seconds.
Spies Like Us: While cloaked, bump into an enemy cloaked Spy.
Spy Milestone 1: Achieve 5 of the achievements in the Spy Pack.
Spy Milestone 2: Achieve 11 of the achievements in the Spy Pack.
Spy Milestone 3: Achieve 17 of the achievements in the Spy Pack.
Spymaster: Backstab 1000 enemies.
The Man From P.u.n.c.t.u.r.e.: Stab an enemy while fencing.
The Man With The Broken Guns: Backstab an Engineer, then sap 3 of his buildings within 10 seconds.
The Melbourne Supremacy: Dominate a Sniper.
Triplecrossed: Backstab 3 Snipers in a single life.
Wetwork: Stab an enemy to death while under the influence of Jarate.
Who's Your Daddy?: Headshot 3 Scouts with the Ambassador.
You Only Shiv Thrice: Backstab 3 enemies within 10 seconds.

Complete the following tasks to as a demolition class unlock the corresponding Steam achievements. After getting 10 achievements you will unlock a new primary weapon. After getting 16 achievements you will unlock a new secondary weapon. After getting 22 achievements you will unlock a new melee weapon.

Beat Me Up, Scotty: Use a full charge critical swing with the Eyelander to kill 5 enemy players.
Blind Fire: Kill an Engineer building that you can't see with a direct hit from your Grenade Launcher.
Bloody Merry: Provide an enemy player with a freeze cam of your smiling face.
Brainspotting: Decapitate 50 enemy players.
Bravehurt: Kill 200 players defending a capture point or cart.
Caber Toss: Bounce an enemy into the air and kill them before they land.
Cry Some Moor!: Destroy 50 buildings.
Double Mauled Scotch: Kill 2 people in a single sticky jump.
Glasg0wned: Kill 25 Scouts and Pyros with the Grenade Launcher.
He Who Celt It: Use the Sticky Launcher to kill an enemy player via environmental damage.
Highland Fling: Sticky jump a really long way...
Kilt in Action: Kill 500 enemy Soldiers.
Laddy Macdeth: Kill 50 enemies with direct hits from the Grenade Launcher.
Left 4 Heads: Decapitate 4 players with only 10 seconds between each kill.
Loch Ness Bombster: Kill an enemy player with sticky bombs within 5 seconds of them teleporting.
Pipebagger: Kill at least three players with a single detonation of sticky bombs.
Robbed Royal: Destroy 100 sticky bombs with the Scottish Resistance.
Scotch Guard: Kill 3 enemies capping or pushing a cart in a single Stickybomb detonation 3 separate times.
Scotch Tap: Glory in the slaughter of your enemies using the Eyelander.
Second Eye: Provide an enemy player with a freeze cam of you shaking your rump.
Shorn Connery: Decapitate a cloaked Spy.
Slammy Slayvis Woundya: Decapitate an enemy Soldier who is brandishing the Equalizer.
Something Stickied This Way Comes: Kill 30 players with air burst sticky bombs.
Spynal Tap: Kill 20 spies within 5 seconds of them sapping a friendly building.
Sticky Thump: Using the Scottish Resistance, kill 3 players in separate explosions without placing new sticky bombs.
Tam O'Shatter: Destroy 5 enemy Engineer buildings during a single ÜberCharge from a Medic.
Tartan Spartan: Do 1 million points of total blast damage.
The Argyle Sap: Blow up an Engineer, his sentry gun, and his dispenser with a single Sticky bomb detonation.
The High Road: Sticky jump onto a cap point and capture it.
The Scottish Play: Get a melee kill while sticky jumping.
The Stickening: Kill 5 Heavies from full health with a single sticky bomb detonation.
The Targe Charge: Charge and kill someone with your shield bash.
There Can Be Only One: Decapitate your nemesis.
Three Times a Laddy: Dominate three Engineers.
Well Plaid!: Kill 10 enemies while assisting or being assisted by another Demoman.

Complete the following tasks to as a soldier class unlock the corresponding Steam achievements. After getting 10 achievements you will unlock a new primary weapon. After getting 16 achievements you will unlock a new secondary weapon. After getting 22 achievements you will unlock a new melee weapon.

Ain't Got Time to Bleed: Kill 3 players with the Equalizer in a single life without being healed.
Backdraft Dodger: Kill a Pyro who has airblasted one of your rockets in the last 10 seconds.
Banner of Brothers: Buff 5 steam friends at once with the Buff Banner.
Bomb Squaddie: Destroy 10 sticky bombs with the shotgun in a single life.
Brothers in Harms: Kill 10 enemies while assisting or being assisted by another Soldier.
Crockets Are Such B.S.: Shoot two non-boosted crit rockets in a row.
Death from Above: Rocket jump and kill 2 enemies before you land.
Death From Below: Kill 10 opponents who are airborne with the Direct Hit.
Dominator: Get 3 dominations in a single life.
Duty Bound: While rocket jumping kill an enemy with the Equalizer before you land.
Engineer to Eternity: Kill an Engineer as he repairs his sentry gun while it's under enemy fire.
For Whom the Shell Trolls: Bounce an opponent into the air with a rocket and then kill them with the shotgun before they land.
Frags of our Fathers: Gib 1000 people.
Geneva Contravention: Kill 3 defenseless players after a single match has ended.
Gore-a! Gore-a! Gore-a!: Provide the enemy with a freezecam of you taunting over 3 of their body parts.
Guns of the Navar0wned: Kill 5 Engineer sentries while you are standing outside of their range.
Hamburger Hill: Defend a cap point 30 times.
Medals of Honor: Finish a round as an MVP 10 times.
Mutually Assured Destruction: Kill an enemy sniper with a rocket after he kills you.
Near Death Experience: Kill 20 enemies with your Equalizer while you have less than 25 health.
Out, Damned Scot!: Kill 500 enemy Demomen
Ride of the Valkartie: Ride the cart for 30 seconds.
S*M*A*S*H: Assist a Medic in exploding 5 enemies with a single ÜberCharge.
Screamin' Eagle: Kill 20 enemies from above.
Semper Fry: Kill 20 enemies while you are on fire.
Spray of Defeat: Use a grenade to gib a player.
The Boostie Boys: Buff 15 teammates with the Buff Banner in a single life.
The Longest Daze: Kill 5 stunned players.
Trench Warfare: Kill your nemesis with a shovel.
Tri-Splatteral Damage: Kill 3 enemies with a single critical rocket.
War Crime and Punishment: In a single life, kill 3 enemies who have damaged a Medic that is healing you.
War Crime Spybunal: Kill a Spy who just backstabbed a teammate.
Where Eagles Dare: Get the highest possible rocket jump using jump and crouch.
Wings of Glory: Kill an enemy soldier while both you and the target are airborne.
Worth a Thousand Words: Provide the enemy with a freezecam of your 21 gun salute.

The following achievements require "The Replay" update.

Blockbuster: Achieve 100,000 YouTube views for your movie.
Home Movie: Achieve 100 YouTube views for your movie.
Indie Film Sensation: Achieve 10,000 YouTube views for your movie.
Local Cinema Star: Achieve 1,000 YouTube views for your movie.
Star of My Own Show: Spend some time editing a replay.
That's a Wrap: Save your very first replay.
Time For Your Close-Up, Mr. Hale: Render a replay into a movie.
We Can Fix It In Post: While watching a replay, press space bar to enter the editor.

Hint: Faster construction:
As an engineer, do not wait for your building. Simply whack it with the wrench so that it builds faster.
fbig, gbvesnahte05.

Hint: Survive your Equalizer's taunt:
Have a Medic buff you to 300 HP, then change to the Equalizer and do its taunt as soon as possible. You will not die, but you will be left with minimal HP and be thrown straight up. Make sure to do it below a low ceiling or bridge, or else you will die from the fall damage.
Augusto Almeida.

Hint: Airblast:
The Pyro can airblast people or rockets, stickies, and grenades by Right Clicking when equipped with the normal flamethrower. It does not work with the Backburner. This can be useful to throw back an ubered pair going to your sentries or going to the spawn point. Usually the enemies are disoriented by being airblasted and will not react quickly to kill the Pyro, mainly if it is a Demoman aiming for Sentries. You can also throw away stickies that are near your spawn points, on capture points, or on a cart. It is also a way to reach the Hot Potato achievement faster. It is easier with stickies on the ground than a moving rocket when you are not used to airblasting. Because the cost is 25 ammo, airblast only when it is helpful or you will be forced to take ammo pack or to retreat to the nearest dispenser.

Hint: Uber limitations:
When uber, you cannot push the cart or take a control point. Do not stay with a partner that you have ubered near the cart; it will be a waste of time.

Never take intel if you want to uber. You will not be able to deploy it with intel on your back. If you try to uber a teammate with intel on his back, you will be the only one to become uber.

Hint: Updated weapons:
To get each of the newer updated weapons, you must get a certain amount of achievements to unlock a milestone achievement, unlocking one of the three weapons for each class.

Glitch: Mismatched body parts:
When a player is gibbed, the positions of the gibs (body parts) do not match where that body part was prior to the gibbing. As well, some class gibs match their beta designs, but not their final counterparts. This is most noticeable with the spy.
nelson340.

Glitch: Taunt with wrong weapon:
When equipped with any weapon, taunt and switch to any other weapon at the same time (preferably with a number on your keyboard rather than the mouse wheel). If timed correctly, your character will do the first weapon's taunt, but he will be holding the weapon you switched to. This may require a few attempts.
joebob.

Glitch: Spycrab:
The Spycrab is an awkward pose that occurs when a Spy crouches and looks up with with his disguise kit. [Screenshot] [Video]

Glitch: Humping Sniper:
If a Sniper crouches, looks up and keeps zooming in and out with the sniper rifle, he will move his hips back and forth. [Video]

Glitch: Spy taunting while invisible:
This is very similar to the "Taunt with wrong weapon" glitch. As a Spy, choose a weapon to taunt with, and at the correct moment, cloak.

Hint: Spycrab taunt:
Due to the Spycrab's popularity, Valve created a Spycrab taunt for the disguise kit. The chance of doing this taunt is approximately 10%. [Video]