Achievement Unlocked Game Visibility Global Unlocks
All 4 Dead
Kill all four Survivors on one life as a Tank. 		Unlocked
Left 4 Dead 8.5%
BARF BAGGED
Cover four Survivors with Boomer bile at once. 		Unlocked
Left 4 Dead 10.1%
CR0WND
Kill a Witch with a single headshot. 		Unlocked
Left 4 Dead 12.0%
VIOLENCE IS GOLDEN
Earn a Gold medal in Survival mode on any official level. 		Unlocked
Left 4 Dead 10.7%
DO NOT DISTURB
Sneak past all Witches in a campaign without disturbing one. 		Unlocked
Left 4 Dead 13.6%
BIG DRAG
Drag a Survivor 100 feet with your tongue as a Smoker. 		Unlocked
Left 4 Dead 11.8%
LAMB 2 SLAUGHTER
As an Infected, incap a Survivor who has entered and left a safe room. 		Unlocked
Left 4 Dead 11.6%
FIELD MEDIC
Heal 25 Survivors with a first aid kit. 		Unlocked
Left 4 Dead 12.9%
SILVER BULLETS
Earn a Silver medal in Survival mode on any official level. 		Unlocked
Left 4 Dead 12.7%
BACK 2 HELP
Leave a safe room to save an incapped teammate and bring them back safely. 		Unlocked
Left 4 Dead 14.9%
DEAD WRECKENING
Dole out 5000 total Survivor damage as a Special Infected. 		Unlocked
Left 4 Dead 10.8%
PHARM-ASSIST
Give pain pills to 10 Survivors. 		Unlocked
Left 4 Dead 15.3%
LAST STAND
Complete one round of Survival on The Last Stand. 		Unlocked
Left 4 Dead 14.9%
HELPING HAND
Revive 50 incapacitated Survivors. 		Unlocked
Left 4 Dead 15.5%
CHAIN SMOKER
Constrict two Survivors on one life as a Smoker. 		Unlocked
Left 4 Dead 15.9%
DEAD GIVEAWAY
Heal a fellow Survivor when your own health is below 10. 		Unlocked
Left 4 Dead 18.1%
STAND TALL
Survive a campaign without being incapacitated. 		Unlocked
Left 4 Dead 22.0%
DOUBLE JUMP
Pounce two different Survivors on one life as a Hunter. 		Unlocked
Left 4 Dead 16.9%
BRONZE METTLE
Earn a Bronze medal in Survival mode on any official level. 		Unlocked
Left 4 Dead 17.9%
GRIM REAPER
Survive the Blood Harvest campaign. 		Unlocked
Left 4 Dead 22.8%
CLEAN KILL
Shove a Boomer and then kill him without him splashing on anyone. 		Unlocked
Left 4 Dead 23.9%
TOLL COLLECTOR
Survive the Death Toll campaign. 		Unlocked
Left 4 Dead 26.2%
DEAD BARON
Survive the Dead Air campaign. 		Unlocked
Left 4 Dead 26.6%
JUMP SHOT
Headshot a Hunter while he's leaping. 		Unlocked
Left 4 Dead 29.2%
GROUND COVER
Save another Survivor from a Special Infected while on the ground. 		Unlocked
Left 4 Dead 27.3%
MERCY KILLER
Survive the No Mercy campaign. 		Unlocked
Left 4 Dead 35.3%
BURN THE WITCH
Light a Witch with a Molotov. 		Unlocked
Left 4 Dead 34.1%
SPINAL TAP
Kill an Infected with a single blow from behind. 		Unlocked
Left 4 Dead 35.2%
DEAD STOP
Punch a Hunter as he is pouncing. 		Unlocked
Left 4 Dead 34.0%
OUTBREAK
Catch a rare strain of infection, then pass it on to someone else. 		Unlocked
Left 4 Dead 25.8%
WITCH HUNTER
Kill a Witch without any Survivor taking damage from her. 		Unlocked
Left 4 Dead 40.5%
NO-ONE LEFT BEHIND
Beat a campaign with all 4 Survivors. 		Unlocked
Left 4 Dead 42.6%
NO SMOKING SECTION
Kill 10 Smokers as they are pulling helpless Survivors. 		Unlocked
Left 4 Dead 36.8%
HERO CLOSET
Rescue a Survivor trapped in a closet. 		Unlocked
Left 4 Dead 44.1%
HUNTER PUNTER
Shove a Hunter off of a pinned and helpless Survivor. 		Unlocked
Left 4 Dead 41.2%
101 CREMATIONS
Set 101 Infected on fire. 		Unlocked
Left 4 Dead 41.2%
TOWERING INFERNO
Light a Tank with a Molotov. 		Unlocked
Left 4 Dead 47.7%
MY BODYGUARD
Protect any Survivor from an attacking Infected 50 times. 		Unlocked
Left 4 Dead 42.9%
PYROTECHNICIAN
Blow up 20 Infected in a single explosion. 		Unlocked
Left 4 Dead 51.8%
BLIND LUCK
You or another Survivor take no damage after being vomited on by a Boomer. 		Unlocked
Left 4 Dead 53.9%
TANKBUSTERS
Kill a Tank without it dealing any damage to a Survivor. 		Unlocked
Left 4 Dead 57.7%
BRAIN SALAD
Make 100 headshot kills. 		Unlocked
Left 4 Dead 55.5%
TONGUE TWISTER
Kill a Smoker who has grabbed you with his tongue. 		Unlocked
Left 4 Dead 59.1%
DRAG AND DROP
Rescue a Survivor from a Smoker's tongue before he takes damage. 		Unlocked
Left 4 Dead 64.8%
BRIDGE OVER TREBLED SLAUGHTER
Cross the bridge finale in less than three minutes. 		Unlocked
Left 4 Dead 2 4.3%
LEVEL A CHARGE
Kill a Charger with a melee weapon while they are charging. 		Unlocked
Left 4 Dead 2 7.9%
Got A Light?
Ignite an enemy Spy while he's flicking a cigarette. 		Unlocked
Team Fortress 2 9.0%
Does It Hurt When I Do This?
Kill 50 Scouts with your syringe gun. 		Unlocked
Team Fortress 2 8.1%
Ubi concordia, ibi victoria
Assist in killing 3 enemies on an enemy control point, in a single life. 		Unlocked
Team Fortress 2 9.7%
Redistribution of Health
Heal 1000 damage with med-kits in a single life. 		Unlocked
Team Fortress 2 9.8%
Peer Review
Kill 10 Medics with your bone saw. 		Unlocked
Team Fortress 2 9.0%
Gorky Parked
Kill 25 enemies while you're standing on a control point you own. 		Unlocked
Team Fortress 2 8.8%
Class Struggle
Work with a friendly Medic to kill an enemy Heavy & Medic pair. 		Unlocked
Team Fortress 2 9.9%
Combined Fire
Use your shotgun to finish off 20 players you've ignited. 		Unlocked
Team Fortress 2 9.1%
Purge
Kill 15 enemies capturing a control point you own. 		Unlocked
Team Fortress 2 9.3%
Consultation
Assist a fellow Medic in killing 3 enemies in a single life. 		Unlocked
Team Fortress 2 10.5%
Dodgers 1, Giants 0
Kill an enemy Heavy and take his Sandvich. 		Unlocked
Team Fortress 2 11.3%
Dance Dance Immolation
Kill 3 enemies while they're taunting. 		Unlocked
Team Fortress 2 10.9%
Clearcutter
Kill 6 people with your axe in one life. 		Unlocked
Team Fortress 2 11.0%
Sawbones
Hit enemies with your bonesaw 5 times in a row without dying or missing. 		Unlocked
Team Fortress 2 11.6%
Show Trial
Kill an enemy with a taunt. 		Unlocked
Team Fortress 2 12.2%
Heavy Milestone 2
Achieve 16 of the achievements in the Heavy pack. 		Unlocked
Team Fortress 2 13.5%
0wn the Means of Production
Remove 20 stickybombs by killing the Demomen who produced them. 		Unlocked
Team Fortress 2 11.6%
OMGWTFBBQ
Kill an enemy with a taunt. 		Unlocked
Team Fortress 2 12.8%
Triple Steal
Capture the enemy intelligence 3 times in a single CTF round. 		Unlocked
Team Fortress 2 12.7%
Baptism by Fire
Force 10 burning enemies to jump into water. 		Unlocked
Team Fortress 2 12.6%
Lumberjack
Kill 3 people with your axe in one life. 		Unlocked
Team Fortress 2 13.0%
Heavy Industry
Fire $200,000 worth of minigun rounds in a single life. 		Unlocked
Team Fortress 2 13.1%
Icing on the Cake
Get 20 kills on players that you're dominating. 		Unlocked
Team Fortress 2 12.2%
If You Build It
Destroy 3 enemy buildings while they are still under construction. 		Unlocked
Team Fortress 2 13.2%
Firewatch
Ignite 10 Snipers while they are zoomed in. 		Unlocked
Team Fortress 2 13.9%
Pyro Milestone 2
Achieve 16 of the achievements in the Pyro pack. 		Unlocked
Team Fortress 2 15.5%
House Call
Join a game that one of your friends is in and then deploy an ÜberCharge on him. 		Unlocked
Team Fortress 2 14.8%
Rationing
Kill an enemy with your shotgun while you're out of minigun ammo. 		Unlocked
Team Fortress 2 14.4%
Heavy Milestone 1
Achieve 10 of the achievements in the Heavy pack. 		Unlocked
Team Fortress 2 15.6%
Double Blind Trial
Deploy an ÜberCharge within 8 seconds of a nearby enemy Medic deploying his. 		Unlocked
Team Fortress 2 16.0%
Fire and Forget
Kill 15 players while you're dead. 		Unlocked
Team Fortress 2 15.4%
Burn Ward
Ignite 3 Medics that are ready to deploy an ÜberCharge. 		Unlocked
Team Fortress 2 16.2%
Überectomy
Kill a Medic that is ready to deploy an ÜberCharge. 		Unlocked
Team Fortress 2 16.7%
No-Hitter
Steal and then capture the enemy intelligence without firing a shot. 		Unlocked
Team Fortress 2 17.0%
BarbeQueQ
Cause a dominated player to leave the server. 		Unlocked
Team Fortress 2 16.5%
Communist Mani-Fisto
Kill an enemy with a critical punch. 		Unlocked
Team Fortress 2 16.7%
Permanent Revolution
Kill 5 enemies without spinning down your gun. 		Unlocked
Team Fortress 2 16.2%
Pyro Milestone 1
Achieve 10 of the achievements in the Pyro pack. 		Unlocked
Team Fortress 2 18.0%
Red Oktoberfest
Earn a domination for a Medic who's healing you. 		Unlocked
Team Fortress 2 16.9%
I'm Bat Man
Survive 500 damage in one life. 		Unlocked
Team Fortress 2 18.1%
Spontaneous Combustion
Ignite 10 cloaked Spies. 		Unlocked
Team Fortress 2 17.8%
I Fry
Ignite 10 disguised Spies. 		Unlocked
Team Fortress 2 18.1%
Crock Block
Survive a direct hit from a critical rocket. 		Unlocked
Team Fortress 2 18.7%
Enemy at the Gate
Kill an opponent within the first second of a round. 		Unlocked
Team Fortress 2 18.8%
Bedside Manner
Be healing a teammate as he achieves an achievement of his own. 		Unlocked
Team Fortress 2 18.4%
Vanguard Party
Be the first on your team to start capturing a control point in a round. 		Unlocked
Team Fortress 2 18.5%
Australian Rules
Dominate an enemy Sniper. 		Unlocked
Team Fortress 2 19.4%
Self-destruct Sequence
Headshot 10 enemy Snipers. 		Unlocked
Team Fortress 2 19.1%
Shoot the Breeze
Kill a fully invisible Spy in a single hit. 		Unlocked
Team Fortress 2 20.3%
Grey Matter
Get 25 headshots as a Sniper. 		Unlocked
Team Fortress 2 20.2%
Dynasty
Win 20 games. 		Unlocked
Team Fortress 2 20.8%
Weenie Roast
Have 2 enemy Scouts on fire at the same time. 		Unlocked
Team Fortress 2 22.4%
Sniper Milestone 1
Achieve 5 of the achievements in the Sniper pack. 		Unlocked
Team Fortress 2 23.4%
Triple Prey
In a single round, get a kill with 3 different weapons. 		Unlocked
Team Fortress 2 23.1%
Spies Like Us
While cloaked, bump into an enemy cloaked Spy. 		Unlocked
Team Fortress 2 24.3%
Be Efficient
Get 3 kills with the Sniper Rifle without missing a shot. 		Unlocked
Team Fortress 2 25.0%
Rasputin
In a single life, get shot, burned, bludgeoned, and receive explosive damage. 		Unlocked
Team Fortress 2 26.6%
Dead Heat
Kill an enemy in the same second that he kills you. 		Unlocked
Team Fortress 2 26.9%
Second Degree Burn
Kill a burning enemy who was ignited by another Pyro. 		Unlocked
Team Fortress 2 27.1%
Dropped Dead
Kill a Scout in midair with your Sniper Rifle or the Huntsman. 		Unlocked
Team Fortress 2 27.4%
Next of Kindling
Ignite an enemy, and the Medic healing him. 		Unlocked
Team Fortress 2 29.0%
Marxman
Kill 10 enemies in mid-air with the minigun. 		Unlocked
Team Fortress 2 26.7%
Flamethrower
Set five enemies on fire in 30 seconds. 		Unlocked
Team Fortress 2 29.5%
Nemesis
Get five revenge kills. 		Unlocked
Team Fortress 2 29.2%
Camp Fire
Kill 3 enemies in a row, all within the same area. 		Unlocked
Team Fortress 2 31.6%
Hard to Kill
Get five kills in a row without dying. 		Unlocked
Team Fortress 2 38.0%
Iron Kurtain
Take 1000 points of damage in a single life. 		Unlocked
Team Fortress 2 41.7%
Social Outburst
Kill 8 Specimens with One Grenade. 		Unlocked
Killing Floor 50.6%
Experimenticenticide
Kill 100 Specimens. 		Unlocked
Killing Floor 68.0%
It's Not Easy Being Greasy
Cause a Specimen to Die by Luring them into Bloat Acid. 		Unlocked
Killing Floor 67.3%
Hot Potat0wned
Kill a Combine soldier with his own grenade. 		Unlocked
Half-Life 2: Episode Two 10.3%
Payback
Kill a Hunter with its own flechettes. 		Unlocked
Half-Life 2: Episode Two 20.7%
Bone Breaker
Kill 30 enemies with thrown physics objects. 		Unlocked
Half-Life 2: Episode Two 23.9%
Pedal to the Metal
Beat DOG in a race to the White Forest base. 		Unlocked
Half-Life 2: Episode Two 37.6%
Cache Checker
Find every radar cache in chapter Under The Radar. 		Unlocked
Half-Life 2: Episode Two 46.2%
Gordon Propelled Rocket
Unlock the rocket launcher lambda cache in chapter Under The Radar. 		Unlocked
Half-Life 2: Episode Two 59.9%
Defense of the Armament
Save the missile silo from the Combine offensive. 		Unlocked
Half-Life 2: Episode Two 61.3%
Secondary Silo Secured
Secure the launch doors on missile silo 2. 		Unlocked
Half-Life 2: Episode Two 70.2%
Quiet Mountain Getaway
Survive the ambush at White Forest Inn. 		Unlocked
Half-Life 2: Episode Two 71.4%
Gunishment!
Destroy the Combine Autogun in the junkyard. 		Unlocked
Half-Life 2: Episode Two 72.4%
Meet the Hunters
Survive the Hunter ambush with Alyx. 		Unlocked
Half-Life 2: Episode Two 74.1%
Twofer
Defeat both antlion guards outside the White Forest. 		Unlocked
Half-Life 2: Episode Two 76.3%
Acid Reflex
Kill an acid antlion worker. 		Unlocked
Half-Life 2: Episode Two 90.4%
Eradicator
Kill 100 aliens. 		Unlocked
Defense Grid: The Awakening 89.8%
Leadhead
Build 5 Gun towers. 		Unlocked
Defense Grid: The Awakening 90.4%
Field Promotion
Earn at least one silver medal. 		Unlocked
Defense Grid: The Awakening 91.3%
Happy Returns
Recover a loose core. 		Unlocked
Defense Grid: The Awakening 92.7%
Hey! That's mine!
Kill an alien carrying a power core. 		Unlocked
Defense Grid: The Awakening 92.8%
First Blood
Kill 1 alien. 		Unlocked
Defense Grid: The Awakening 93.4%
Friendly Fire
Knock down a turret with another turret. 		Unlocked
Portal 49.2%
Heartbreaker
Complete Portal. 		Unlocked
Portal 52.5%
Partygoer
Make the correct party escort submission position decision. 		Unlocked
Portal 55.9%
Fratricide
Do whatever it takes to survive. 		Unlocked
Portal 63.8%
Lab Rat
Acquire the fully powered Aperture Science Handheld Portal Device. 		Unlocked
Portal 81.5%