Achievement Unlocked Game Visibility Global Unlocks
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 22.7%
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 26.5%
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 27.2%
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 25.7%
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 36.7%
HERO CLOSET
Rescue a Survivor trapped in a closet. 		Unlocked
Left 4 Dead 44.0%
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 41.1%
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 42.8%
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 57.6%
BRAIN SALAD
Make 100 headshot kills. 		Unlocked
Left 4 Dead 55.4%
TONGUE TWISTER
Kill a Smoker who has grabbed you with his tongue. 		Unlocked
Left 4 Dead 59.0%
DRAG AND DROP
Rescue a Survivor from a Smoker's tongue before he takes damage. 		Unlocked
Left 4 Dead 64.7%
The Adventure Begins
Find the entrance to the mine 		Unlocked
Torchlight 72.0%
SCAVENGE HUNT
Stop the enemy team from collecting any gas cans during a Scavenge round. 		Unlocked
Left 4 Dead 2 5.4%
HUNTING PARTY
Win a game of Scavenge. 		Unlocked
Left 4 Dead 2 5.8%
FORE!
Knock off the heads of 18 infected with the golf club. 		Unlocked
Left 4 Dead 2 11.5%
KILLING THEM SWIFTLY TO THIS SONG
Play the new Midnight Riders song on a jukebox. 		Unlocked
Left 4 Dead 2 11.3%
HEAD HONCHO
Decapitate 200 Infected with a melee weapon. 		Unlocked
Left 4 Dead 2 24.0%
TORCH BEARER
Survive The Passing Campaign. 		Unlocked
Left 4 Dead 2 29.6%
Pedal to the Metal
Beat DOG in a race to the White Forest base. 		Unlocked
Half-Life 2: Episode Two 37.7%
Hit and Run
Run over 20 enemies with the car in Episode Two. 		Unlocked
Half-Life 2: Episode Two 36.2%
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%
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%
Into the Breach
Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft. 		Unlocked
Half-Life 2: Episode Two 83.3%
Acid Reflex
Kill an acid antlion worker. 		Unlocked
Half-Life 2: Episode Two 90.3%
Spotlight Finish
Finish Clean, Gold before finish, hit last block, elite only. 		Unlocked
Audiosurf 3.9%
Stealth Adept
Using Ninja Mono, earn Stealth. 3 min minimum. 		Unlocked
Audiosurf 14.0%
Big Kahuna
Score 17000 points in a single match. 		Unlocked
Audiosurf 14.1%
Ninjutsu
Stealth and collect every color block. 3 min minimum. 		Unlocked
Audiosurf 14.9%
Stainless
Earn Clean Finish and Gold 3 times in a row. 		Unlocked
Audiosurf 27.1%
PPM 30,000
30000 points per minute. 3 minute minimum. 		Unlocked
Audiosurf 31.1%
Olympian
Earn triple a gold medal requirement. 2 min minimum. 		Unlocked
Audiosurf 68.5%
PPM 10,000
10000 points per minute. 3 minute minimum. 		Unlocked
Audiosurf 76.7%
Royal Ride
Earn Gold without overfilling. 2 min minimum. 		Unlocked
Audiosurf 80.3%
Terminal Velocity
Fall 30,000 feet. 		Unlocked
Portal 8.7%
Vanilla Crazy Cake
Beat all six Portal advanced maps. 		Unlocked
Portal 9.0%
Long Jump
Jump 300 feet. 		Unlocked
Portal 13.8%
Fruitcake
Beat four Portal advanced maps. 		Unlocked
Portal 11.9%
Cupcake
Beat two Portal advanced maps. 		Unlocked
Portal 18.4%
Friendly Fire
Knock down a turret with another turret. 		Unlocked
Portal 49.1%
Heartbreaker
Complete Portal. 		Unlocked
Portal 52.4%
Partygoer
Make the correct party escort submission position decision. 		Unlocked
Portal 55.9%
Fratricide
Do whatever it takes to survive. 		Unlocked
Portal 63.7%
Lab Rat
Acquire the fully powered Aperture Science Handheld Portal Device. 		Unlocked
Portal 81.4%