Vanilla Crazy Cake
Beat all six Portal advanced maps.
30 ✓ April 15th, 2011
Impossible Defense
Successfully defend Gravel Pit without giving up a capture.
30 ✓ April 18th, 2011
Fruitcake
Beat four Portal advanced maps.
20 ✓ April 15th, 2011
Relentless Offense
Win Hydro without giving up a capture.
20 ✓ April 18th, 2011
Master of Disguise
Trick an opposing medic into healing you.
15 ✓ September 6th, 2008
Vorticough
Discover the hidden singing vortigaunt cave in chapter Water Hazard.
13 ✓ January 1st, 1753
Heartbreaker
Complete Portal.
10 ✓ August 14th, 2008
Cupcake
Beat two Portal advanced maps.
10 ✓ April 15th, 2011
Hard to Kill
Get five kills in a row without dying.
10 ✓ August 15th, 2008
Dynasty
Win 20 games.
10 ✓ April 18th, 2011
Lightning Offense
Win Well in 5 minutes or less.
10 ✓ April 18th, 2011
Impenetrable Defense
Successfully defend Dustbowl without giving up a capture.
10 ✓ April 18th, 2011
Follow Freeman
Gain command of a squad of rebels in the uprising.
10 ✓ January 1st, 1753
Hot PotatOwned
Kill a Combine soldier with his own grenade.
10 ✓ January 1st, 1753
Think Fast!
Kill an Elite Soldier with his own energy ball.
10 ✓ January 1st, 1753
Revenge!
Destroy the hunter-chopper in Half-Life 2.
10 ✓ January 1st, 1753
Blast from the Past
Find the HEV Suit Charger faceplate in Eli's scrapyard.
10 ✓ January 1st, 1753
Bug Hunt
Use the antlions to kill 50 enemies.
10 ✓ January 1st, 1753
Warden Freeman
Survive the second turret standoff in Nova Prospekt.
10 ✓ January 1st, 1753
Plaza Defender
Survive the generator plaza standoff in chapter Anticitizen One.
10 ✓ January 1st, 1753
Fight the Power
Shut down the supression device by disabling its generators.
10 ✓ January 1st, 1753
Giant Killer
Survive the rooftop strider battle in the ruins of City 17.
10 ✓ January 1st, 1753
Lab Rat
Acquire the fully powered Aperture Science Handheld Portal Device.
5 ✓ August 14th, 2008
Fratricide
Do whatever it takes to survive.
5 ✓ August 14th, 2008
Partygoer
Make the correct party escort submission position decision.
5 ✓ August 14th, 2008
Terminal Velocity
Fall 30,000 feet.
5 ✓ August 21st, 2008
Long Jump
Jump 300 feet.
5 ✓ April 15th, 2011
Nemesis
Get five revenge kills.
5 ✓ September 6th, 2008
Powerhouse Offense
Win 2Fort with a shutout.
5 ✓ September 11th, 2008
Head of the Class
Play a complete round with every class.
5 ✓ April 18th, 2011
World Traveler
Play a complete game on every map.
5 ✓ April 18th, 2011
Camera Shy
Detach security cameras from the walls.
5 ✓ August 21st, 2008
Friendly Fire
Knock down a turret with another turret.
5 ✓ August 14th, 2008
Bone Breaker
Kill 30 enemies with thrown physics objects.
5 ✓ January 1st, 1753
Deadly Harvest
Kill an enemy by planting a hopper mine.
5 ✓ January 1st, 1753
Hack Attack!
Kill five enemies with a Manhack.
5 ✓ January 1st, 1753
Conservationist
Kill five enemies with the same energy ball.
5 ✓ January 1st, 1753
Defiant
Hit the trashcan cop with the can.
5 ✓ April 18th, 2011
Submissive
Put the can in the trash.
5 ✓ August 21st, 2008
Malcontent
Escape the apartment block raid.
5 ✓ August 21st, 2008
What cat?
Break the mini-teleporter in Kleiner's lab.
5 ✓ April 18th, 2011
Trusty Hardware
Get the crowbar.
5 ✓ August 21st, 2008
Barnacle Bowling
Kill five barnacles with one barrel.
5 ✓ April 18th, 2011
Anchor's Aweigh!
Get the airboat.
5 ✓ January 1st, 1753
Heavy Weapons
Get the airboat's mounted gun.
5 ✓ January 1st, 1753
Zero-Point Energy
Get the Gravity Gun in Black Mesa East.
5 ✓ January 1st, 1753
Hallowed Ground
Escort Gregori safely through the church cemetery.
5 ✓ January 1st, 1753
Where Cubbage Fears to Tread
Defend Little Odessa from the gunship attack.
5 ✓ January 1st, 1753
One Man Army
Destroy six gunships in Half-Life 2.
5 ✓ January 1st, 1753
"Radiation Levels Detected"
Get through the toxic tunnel under City 17 in Half-Life 2.
5 ✓ January 1st, 1753
Counter-Sniper
Kill all of the snipers in City 17.
5 ✓ January 1st, 1753
Two Points
Use DOG's ball to make a basket in Eli's scrapyard.
2 ✓ January 1st, 1753
Aperture Science
Earn gold medals on all Portal challenges.
40 
The One Free Bullet
Beat Episode One firing exactly one bullet. Grenade, crowbar, rocket, and Gravgun kills are okay!
40 
Neighborhood Watch
Save all buildings outside the missile silo from destruction.
35 
Little Rocket Man
Send the garden gnome into space.
30 
Zombie Chopper
Play through Ravenholm using only the Gravity Gun.
25 
🔐 Singularity Collapse
Destroy the Citadel's reactor core.
25 
🔐 Defense of the Armament
Save the missile silo from the Combine offensive.
20 
Rocket Science
Earn silver medals on all Portal challenges.
20 
Keep Off the Sand!
Cross the antlion beach in chapter Sandtraps without touching the sand.
20 
Escape From City 17
Escape City 17 with Alyx.
20 
Get Some Grub
Squish every antlion grub in Episode Two.
20 
Puttin' On a Clinic
Defeat the chopper in Episode Two without any misses.
15 
Hardcore
Accumulate 1000 total kills.
15 
Lambda Locator
Find all lambda caches in Half-Life 2.
15 
Citizen Escort
Don't let any citizens die when escorting them to the escape train.
15 
🔐 Meet the Hunters
Survive the Hunter ambush with Alyx.
10 
Cache Checker
Find every radar cache in chapter Under The Radar.
10 
🔐 Quiet Mountain Getaway
Survive the ambush at White Forest Inn.
10 
Payback
Kill a Hunter with its own flechettes.
10 
Basic Science
Earn bronze medals on all Portal challenges.
10 
With Friends Like these...
Play in a game with seven or more players from your friends list.
10 
Atomizer
Disintegrate 15 soldiers by throwing them into a Combine ball field.
10 
Pacifist
Contain the Citadel core without killing any stalkers.
10 
Elevator Action
Survive long enough to get on the parking garage elevator.
10 
Live Bait
Help Alyx snipe 30 enemies in Episode One.
10 
Into the Breach
Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
5 
🔐 Twofer
Defeat both antlion guards outside the White Forest.
5 
Hit and Run
Run over 20 enemies with the car in Episode Two.
5 
🔐 Gunishment!
Destroy the Combine cannon in the junkyard.
5 
Gordon Propelled Rocket
Unlock the rocket launcher lambda cache in chapter Under The Radar.
5 
Pedal to the Metal
Beat DOG in a race to the White Forest base.
5 
🔐 Secondary Silo Secured
Secure the launch doors on missile silo 2.
5 
Turret
Accumulate 10 turret kills with a single turret.
5 
Team Doctor
Accumulate 25000 heal points as a Medic.
5 
Flamethrower
Set five enemies on fire in 30 seconds.
5 
Grey Matter
Get 25 headshots as a Sniper.
5 
Grave Robber
Steal a Zombine's grenade.
5 
Zombie-que
Use flares to light 15 zombies on fire.
5 
OSHA Violation
Kill 3 enemies using the crane.
5 
Targetted Advertising
Pin a soldier to the billboard in chapter Highway 17.
5 
Flushed
Kill an enemy with a toilet.
5 
Watch Your Head!
Make it to the bottom of the Citadel's main elevator shaft in one piece.
5 
Containment
Contain the Citadel core.
5 
Car Crusher
Use the cars to squash 15 antlions in Episode One.
5 
Attica!
Destroy the gunship in the hospital attic.
5 
Acid Reflex
Kill an acid antlion worker.
5 
Pinata Party
Find and break every web cache in Episode Two.
5