Vanilla Crazy Cake
Beat all six Portal advanced maps.
30 ✓ May 2nd, 2009
Impossible Defense
Successfully defend Gravel Pit without giving up a capture.
30 ✓ May 1st, 2009
Zombie Chopper
Play through Ravenholm using only the Gravity Gun.
25 ✓ January 1st, 1753
Singularity Collapse
Destroy the Citadel's reactor core.
25 ✓ September 6th, 2010
Defense of the Armament
Save the missile silo from the Combine offensive.
20 ✓ January 25th, 2012
Fruitcake
Beat four Portal advanced maps.
20 ✓ May 2nd, 2009
Relentless Offense
Win Hydro without giving up a capture.
20 ✓ May 1st, 2009
Keep Off the Sand!
Cross the antlion beach in chapter Sandtraps without touching the sand.
20 ✓ January 1st, 1753
Escape From City 17
Escape City 17 with Alyx.
20 ✓ January 23rd, 2012
Master of Disguise
Trick an opposing medic into healing you.
15 ✓ February 7th, 2009
Hardcore
Accumulate 1000 total kills.
15 ✓ May 10th, 2009
Lambda Locator
Find all lambda caches in Half-Life 2.
15 ✓ January 1st, 1753
Vorticough
Discover the hidden singing vortigaunt cave in chapter Water Hazard.
13 ✓ January 1st, 1753
Meet the Hunters
Survive the Hunter ambush with Alyx.
10 ✓ January 24th, 2012
Cache Checker
Find every radar cache in chapter Under The Radar.
10 ✓ January 24th, 2012
Quiet Mountain Getaway
Survive the ambush at White Forest Inn.
10 ✓ January 24th, 2012
Heartbreaker
Complete Portal.
10 ✓ March 14th, 2009
Cupcake
Beat two Portal advanced maps.
10 ✓ May 2nd, 2009
Hard to Kill
Get five kills in a row without dying.
10 ✓ March 14th, 2009
With Friends Like these...
Play in a game with seven or more players from your friends list.
10 ✓ January 1st, 1753
Dynasty
Win 20 games.
10 ✓ April 24th, 2009
Lightning Offense
Win Well in 5 minutes or less.
10 ✓ May 1st, 2009
Impenetrable Defense
Successfully defend Dustbowl without giving up a capture.
10 ✓ May 1st, 2009
Atomizer
Disintegrate 15 soldiers by throwing them into a Combine ball field.
10 ✓ June 13th, 2010
Follow Freeman
Gain command of a squad of rebels in the uprising.
10 ✓ November 1st, 2009
Hot PotatOwned
Kill a Combine soldier with his own grenade.
10 ✓ May 10th, 2009
Think Fast!
Kill an Elite Soldier with his own energy ball.
10 ✓ June 13th, 2010
Revenge!
Destroy the hunter-chopper in Half-Life 2.
10 ✓ May 4th, 2009
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 ✓ October 31st, 2009
Warden Freeman
Survive the second turret standoff in Nova Prospekt.
10 ✓ November 1st, 2009
Plaza Defender
Survive the generator plaza standoff in chapter Anticitizen One.
10 ✓ November 1st, 2009
Fight the Power
Shut down the supression device by disabling its generators.
10 ✓ June 13th, 2010
Giant Killer
Survive the rooftop strider battle in the ruins of City 17.
10 ✓ June 13th, 2010
Elevator Action
Survive long enough to get on the parking garage elevator.
10 ✓ May 15th, 2011
Live Bait
Help Alyx snipe 30 enemies in Episode One.
10 ✓ May 16th, 2011
Into the Breach
Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
5 ✓ January 23rd, 2012
Twofer
Defeat both antlion guards outside the White Forest.
5 ✓ January 23rd, 2012
Hit and Run
Run over 20 enemies with the car in Episode Two.
5 ✓ January 24th, 2012
Gunishment!
Destroy the Combine cannon in the junkyard.
5 ✓ January 24th, 2012
Gordon Propelled Rocket
Unlock the rocket launcher lambda cache in chapter Under The Radar.
5 ✓ January 24th, 2012
Pedal to the Metal
Beat DOG in a race to the White Forest base.
5 ✓ January 24th, 2012
Secondary Silo Secured
Secure the launch doors on missile silo 2.
5 ✓ January 24th, 2012
Lab Rat
Acquire the fully powered Aperture Science Handheld Portal Device.
5 ✓ February 4th, 2009
Fratricide
Do whatever it takes to survive.
5 ✓ March 14th, 2009
Partygoer
Make the correct party escort submission position decision.
5 ✓ March 14th, 2009
Terminal Velocity
Fall 30,000 feet.
5 ✓ January 25th, 2012
Turret
Accumulate 10 turret kills with a single turret.
5 ✓ April 29th, 2009
Nemesis
Get five revenge kills.
5 ✓ April 21st, 2009
Powerhouse Offense
Win 2Fort with a shutout.
5 ✓ February 7th, 2009
Head of the Class
Play a complete round with every class.
5 ✓ April 26th, 2009
World Traveler
Play a complete game on every map.
5 ✓ April 29th, 2009
Team Doctor
Accumulate 25000 heal points as a Medic.
5 ✓ April 27th, 2009
Flamethrower
Set five enemies on fire in 30 seconds.
5 ✓ February 7th, 2009
Grey Matter
Get 25 headshots as a Sniper.
5 ✓ April 16th, 2009
Friendly Fire
Knock down a turret with another turret.
5 ✓ March 14th, 2009
Bone Breaker
Kill 30 enemies with thrown physics objects.
5 ✓ May 6th, 2009
Deadly Harvest
Kill an enemy by planting a hopper mine.
5 ✓ November 1st, 2009
Hack Attack!
Kill five enemies with a Manhack.
5 ✓ January 1st, 1753
Conservationist
Kill five enemies with the same energy ball.
5 ✓ June 13th, 2010
Grave Robber
Steal a Zombine's grenade.
5 ✓ May 15th, 2011
Defiant
Hit the trashcan cop with the can.
5 ✓ April 24th, 2009
Submissive
Put the can in the trash.
5 ✓ February 6th, 2009
Malcontent
Escape the apartment block raid.
5 ✓ February 6th, 2009
What cat?
Break the mini-teleporter in Kleiner's lab.
5 ✓ January 1st, 1753
Trusty Hardware
Get the crowbar.
5 ✓ February 6th, 2009
Barnacle Bowling
Kill five barnacles with one barrel.
5 ✓ January 1st, 1753
Anchor's Aweigh!
Get the airboat.
5 ✓ May 2nd, 2009
Heavy Weapons
Get the airboat's mounted gun.
5 ✓ May 4th, 2009
Zero-Point Energy
Get the Gravity Gun in Black Mesa East.
5 ✓ May 4th, 2009
Hallowed Ground
Escort Gregori safely through the church cemetery.
5 ✓ May 6th, 2009
OSHA Violation
Kill 3 enemies using the crane.
5 ✓ May 7th, 2009
Targetted Advertising
Pin a soldier to the billboard in chapter Highway 17.
5 ✓ May 7th, 2009
Where Cubbage Fears to Tread
Defend Little Odessa from the gunship attack.
5 ✓ May 7th, 2009
One Man Army
Destroy six gunships in Half-Life 2.
5 ✓ June 13th, 2010
Flushed
Kill an enemy with a toilet.
5 ✓ January 1st, 1753
"Radiation Levels Detected"
Get through the toxic tunnel under City 17 in Half-Life 2.
5 ✓ November 1st, 2009
Counter-Sniper
Kill all of the snipers in City 17.
5 ✓ January 1st, 1753
Watch Your Head!
Make it to the bottom of the Citadel's main elevator shaft in one piece.
5 ✓ September 6th, 2010
Containment
Contain the Citadel core.
5 ✓ September 6th, 2010
Attica!
Destroy the gunship in the hospital attic.
5 ✓ May 16th, 2011
Acid Reflex
Kill an acid antlion worker.
5 ✓ January 23rd, 2012
Two Points
Use DOG's ball to make a basket in Eli's scrapyard.
2 ✓ May 4th, 2009
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 
Rocket Science
Earn silver medals on all Portal challenges.
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 
Citizen Escort
Don't let any citizens die when escorting them to the escape train.
15 
Payback
Kill a Hunter with its own flechettes.
10 
Basic Science
Earn bronze medals on all Portal challenges.
10 
Pacifist
Contain the Citadel core without killing any stalkers.
10 
Long Jump
Jump 300 feet.
5 
Camera Shy
Detach security cameras from the walls.
5 
Zombie-que
Use flares to light 15 zombies on fire.
5 
Car Crusher
Use the cars to squash 15 antlions in Episode One.
5 
Pinata Party
Find and break every web cache in Episode Two.
5