Other Games
Containment
Contain the Citadel core.
Achievement
Pacifist
Contain the Citadel core without killing any stalkers.
Achievement
Citizen Escort
Don't let any citizens die when escorting them to the escape train.
Achievement
Escape From City 17
Escape City 17 with Alyx.
Achievement
The One Free Bullet
Finish the game firing exactly one bullet. Grenade, crowbar, rocket, and Gravity Gun kills are okay!
Achievement
Elevator Action
Survive long enough to get on the parking garage elevator.
Achievement
Attica!
Destroy the gunship in the hospital attic.
Achievement
Watch Your Head!
Make it to the bottom of the Citadel's main elevator shaft in one piece.
Achievement
Car Crusher
Use the cars to squash 15 antlions in Episode One.
Achievement
Live Bait
Help Alyx snipe 30 enemies in Episode One.
Achievement
Twofer
Defeat both antlion guards outside the White Forest.
Achievement
Into the Breach
Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Achievement
Defense of the Armament
Save the missile silo from the Combine offensive.
Achievement
Meet the Hunters
Survive the Hunter ambush with Alyx.
Achievement
Secondary Silo Secured
Secure the launch doors on missile silo 2.
Achievement
Neighborhood Watch
Save all buildings outside the missile silo from destruction.
Achievement
Pedal to the Metal
Beat DOG in a race to the White Forest base.
Achievement
Gordon Propelled Rocket
Unlock the rocket launcher lambda cache in chapter Under The Radar.
Achievement
Quiet Mountain Getaway
Survive the ambush at White Forest Inn.
Achievement
Piñata Party
Find and break every web cache in Episode Two.
Achievement
Cache Checker
Find every radar cache in chapter Under The Radar.
Achievement
Get Some Grub
Squish every antlion grub in Episode Two.
Achievement
Puttin' On a Clinic
Defeat the chopper in Episode Two without any misses.
Achievement
Gunishment!
Destroy the Combine Autogun in the junkyard.
Achievement
Hit and Run
Run over 20 enemies with the car in Episode Two.
Achievement
Payback
Kill a Hunter with its own flechettes.
Achievement
Acid Reflex
Kill an acid antlion worker.
Achievement
Little Rocket Man
Send the garden gnome into space.
Achievement
Grave Robber
Steal a Zombine's grenade.
Achievement
Zombie-que
Use flares to light 15 zombies on fire.
Achievement
Gnome Alone
If you are reading this achievement, Gabe Newell has successfully launched Gnome Chompski into space. If you did not also receive the achievement 'Manufacturing Ascent', Newell has abandoned his plans to shoot Noam Chomsky into space.
Achievement
Giant Killer
Survive the rooftop strider battle in the ruins of City 17.
Achievement
Hallowed Ground
Achievement
Keep Off the Sand!
Cross the antlion beach in chapter Sandtraps without touching the sand.
Achievement
Singularity Collapse
Achievement
Plaza Defender
Survive the generator plaza standoff in chapter Anticitizen One.
Achievement
Zombie Chopper
Play through Ravenholm using only the Gravity Gun.
Achievement
Fight the Power
Shut down the supression device by disabling its generators.
Achievement
Radiation Levels Detected
Get through the toxic tunnel under City 17 in Half-Life 2.
Achievement
Warden Freeman
Survive the second turret standoff in Nova Prospekt.
Achievement
What cat?
Break the mini-teleporter in Kleiner's lab.
Achievement
Atomizer
Disintegrate 15 soldiers by throwing them into a Combine ball field.
Achievement
Malcontent
Escape the apartment block raid.
Achievement
Lambda Locator
Find all lambda caches in Half-Life 2.
Achievement
Blast from the Past
Find the HEV Suit Charger faceplate in Eli's scrapyard.
Achievement
Vorticough
Discover the hidden singing vortigaunt cave in chapter Water Hazard.
Achievement
Follow Freeman
Gain command of a squad of rebels in the uprising.
Achievement
Anchor's Aweigh!
Get the airboat.
Achievement
Heavy Weapons
Get the airboat's mounted gun.
Achievement
Trusty Hardware
Get the crowbar.
Achievement
Zero-Point Energy
Get the Gravity Gun in Black Mesa East.
Achievement
Defiant
Achievement
Counter-Sniper
Kill all of the snipers in City 17.
Achievement
Barnacle Bowling
Kill five barnacles with one barrel.
Achievement
Revenge!
Destroy the hunter-chopper in Half-Life 2.
Achievement
Bug Hunt
Use the antlions to kill 50 enemies.
Achievement
OSHA Violation
Kill 3 enemies using the crane.
Achievement
Flushed
Kill an enemy with a toilet.
Achievement
Where Cubbage Fears to Tread
Achievement
One Man Army
Destroy six gunships in Half-Life 2.
Achievement
Two Points
Use DOG's ball to make a basket in Eli's scrapyard.
Achievement
Targetted Advertising
Pin a soldier to the billboard in chapter Highway 17.
Achievement
Submissive
Achievement
Think Fast!
Kill an Elite Soldier with his own energy ball.
Achievement
Hack Attack!
Kill five enemies with a Manhack.
Achievement
Conservationist
Kill five enemies with the same energy ball.
Achievement
Bone Breaker
Kill 30 enemies with thrown physics objects.
Achievement
Deadly Harvest
Kill an enemy by planting a hopper mine.
Achievement
Hot Potat0wned
Kill a Combine soldier with his own grenade.
Achievement