99Achievements
Bone Breaker
Kill 30 enemies with thrown physics objects.
(26.2%)
Deadly Harvest
Kill an enemy by planting a hopper mine.
(23.7%)
Hack Attack!
Kill five enemies with a Manhack.
(6.5%)
Hot PotatOwned
Kill a Combine soldier with his own grenade.
(10.7%)
Conservationist
Kill five enemies with the same energy ball.
(11.1%)
Think Fast!
Kill an Elite Soldier with his own energy ball.
(15.5%)
Grave Robber
Steal a Zombine's grenade.
(17.7%)
Zombie-que
Use flares to light 15 zombies on fire.
(2.9%)
Defiant
This Accomplishment is secret. Keep playing!
(29.0%)
Submissive
This Accomplishment is secret. Keep playing!
(31.8%)
Malcontent
Escape the apartment block raid.
(60.1%)
What cat?
Break the mini-teleporter in Kleiner's lab.
(11.9%)
Trusty Hardware
Get the crowbar.
(58.0%)
Barnacle Bowling
Kill five barnacles with one barrel.
(26.5%)
Anchor's Aweigh!
Get the airboat.
(40.3%)
Heavy Weapons
Get the airboat's mounted gun.
(34.2%)
Vorticough
Discover the hidden singing vortigaunt cave in chapter Water Hazard.
(7.8%)
Revenge!
Destroy the hunter-chopper in Half-Life 2.
(32.1%)
Blast from the Past
Find the HEV Suit Charger faceplate in Eli's scrapyard.
(9.1%)
Zero-Point Energy
Get the Gravity Gun in Black Mesa East.
(31.8%)
Two Points
Use DOG's ball to make a basket in Eli's scrapyard.
(10.4%)
Zombie Chopper
Play through Ravenholm using only the Gravity Gun.
(5.7%)
Hallowed Ground
This Accomplishment is secret. Keep playing!
(28.2%)
OSHA Violation
Kill 3 enemies using the crane.
(19.4%)
Targetted Advertising
Pin a soldier to the billboard in chapter Highway 17.
(10.4%)
Where Cubbage Fears to Tread
This Accomplishment is secret. Keep playing!
(26.9%)
One Man Army
Destroy six gunships in Half-Life 2.
(20.2%)
Keep Off the Sand!
Cross the antlion beach in chapter Sandtraps without touching the sand.
(3.7%)
Bug Hunt
Use the antlions to kill 50 enemies.
(23.2%)
Flushed
Kill an enemy with a toilet.
(6.8%)
Warden Freeman
Survive the second turret standoff in Nova Prospekt.
(21.7%)
"Radiation Levels Detected"
Get through the toxic tunnel under City 17 in Half-Life 2.
(21.0%)
Plaza Defender
Survive the generator plaza standoff in chapter Anticitizen One.
(20.6%)
Counter-Sniper
Kill all of the snipers in City 17.
(6.3%)
Fight the Power
Shut down the supression device by disabling its generators.
(19.6%)
Giant Killer
Survive the rooftop strider battle in the ruins of City 17.
(18.9%)
Singularity Collapse
This Accomplishment is secret. Keep playing!
(18.3%)
Lambda Locator
Find all lambda caches in Half-Life 2.
(1.8%)
Watch Your Head!
Make it to the bottom of the Citadel's main elevator shaft in one piece.
(26.0%)
Containment
Contain the Citadel core.
(23.9%)
Pacifist
Contain the Citadel core without killing any stalkers.
(3.9%)
Car Crusher
Use the cars to squash 15 antlions in Episode One.
(8.0%)
Elevator Action
Survive long enough to get on the parking garage elevator.
(21.1%)
Live Bait
Help Alyx snipe 30 enemies in Episode One.
(12.6%)
Attica!
Destroy the gunship in the hospital attic.
(19.6%)
Citizen Escort
Don't let any citizens die when escorting them to the escape train.
(10.4%)
Escape From City 17
Escape City 17 with Alyx.
(18.5%)
The One Free Bullet
Beat Episode One firing exactly one bullet. Grenade, crowbar, rocket, and Gravgun kills are okay!
(3.7%)
Acid Reflex
Kill an acid antlion worker.
(26.9%)
Get Some Grub
Squish every antlion grub in Episode Two.
(1.7%)
Pinata Party
Find and break every web cache in Episode Two.
(4.2%)
Into the Breach
Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
(23.5%)
Twofer
This Accomplishment is secret. Keep playing!
(19.8%)
Hit and Run
Run over 20 enemies with the car in Episode Two.
(9.7%)
Meet the Hunters
This Accomplishment is secret. Keep playing!
(18.9%)
Puttin' On a Clinic
Defeat the chopper in Episode Two without any misses.
(3.2%)
Gunishment!
This Accomplishment is secret. Keep playing!
(18.3%)
Cache Checker
Find every radar cache in chapter Under The Radar.
(12.4%)
Gordon Propelled Rocket
Unlock the rocket launcher lambda cache in chapter Under The Radar.
(15.0%)
Pedal to the Metal
Beat DOG in a race to the White Forest base.
(8.7%)
Quiet Mountain Getaway
This Accomplishment is secret. Keep playing!
(18.0%)
Little Rocket Man
Send the garden gnome into space.
(2.5%)
Secondary Silo Secured
This Accomplishment is secret. Keep playing!
(17.6%)
Neighborhood Watch
Save all buildings outside the missile silo from destruction.
(2.1%)
Defense of the Armament
This Accomplishment is secret. Keep playing!
(14.8%)
Payback
Kill a Hunter with its own flechettes.
(5.3%)
Lab Rat
Acquire the fully powered Aperture Science Handheld Portal Device.
(57.1%)
Fratricide
Do whatever it takes to survive.
(40.7%)
Partygoer
Make the correct party escort submission position decision.
(34.2%)
Heartbreaker
Complete Portal.
(31.9%)
Terminal Velocity
Fall 30,000 feet.
(10.2%)
Long Jump
Jump 300 feet.
(10.4%)
Cupcake
Beat two Portal advanced maps.
(10.5%)
Fruitcake
Beat four Portal advanced maps.
(7.0%)
Vanilla Crazy Cake
Beat all six Portal advanced maps.
(5.4%)
Basic Science
Earn bronze medals on all Portal challenges.
(1.2%)
Rocket Science
Earn silver medals on all Portal challenges.
(1.2%)
Aperture Science
Earn gold medals on all Portal challenges.
(1.2%)
Turret
Accumulate 10 turret kills with a single turret.
(6.6%)
Nemesis
Get five revenge kills.
(11.9%)
Hard to Kill
Get five kills in a row without dying.
(20.4%)
Master of Disguise
Trick an opposing medic into healing you.
(13.0%)
With Friends Like these...
Play in a game with seven or more players from your friends list.
(2.4%)
Dynasty
Win 20 games.
(9.0%)
Hardcore
Accumulate 1000 total kills.
(4.3%)
Powerhouse Offense
Win 2Fort with a shutout.
(21.2%)
Lightning Offense
Win Well in 5 minutes or less.
(11.8%)
Relentless Offense
Win Hydro without giving up a capture.
(10.0%)
Impenetrable Defense
Successfully defend Dustbowl without giving up a capture.
(10.4%)
Impossible Defense
Successfully defend Gravel Pit without giving up a capture.
(8.0%)
Head of the Class
Play a complete round with every class.
(6.5%)
World Traveler
Play a complete game on every map.
(9.3%)
Team Doctor
Accumulate 25000 heal points as a Medic.
(5.3%)
Flamethrower
Set five enemies on fire in 30 seconds.
(8.0%)
Atomizer
Disintegrate 15 soldiers by throwing them into a Combine ball field.
(11.4%)
Follow Freeman
Gain command of a squad of rebels in the uprising.
(21.6%)
Grey Matter
Get 25 headshots as a Sniper.
(6.3%)
Camera Shy
Detach security cameras from the walls.
(2.4%)
Friendly Fire
Knock down a turret with another turret.
(32.1%)