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Unlockable |
How to Unlock |
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"Radiation Levels Detected" (5) |
Get through the toxic tunnel under City 17 in Half-Life 2. |
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Acid Reflex (5) |
Kill an acid antlion worker. |
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Anchor's Aweigh! (5) |
Get the airboat. |
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Aperture Science (40) |
Earn gold medals on all Portal challenges. |
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Atomizer (10) |
Disintegrate 15 soldiers by throwing them into a Combine ball field. |
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Attica! (5) |
Destroy the gunship in the hospital attic. |
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Barnacle Bowling (5) |
Kill five barnacles with one barrel. |
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Basic Science (10) |
Earn bronze medals on all Portal challenges. |
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Blast from the Past (10) |
Find the HEV Suit Charger faceplate in Eli's scrapyard. |
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Bone Breaker (5) |
Kill 30 enemies with thrown physics objects. |
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Bug Hunt (10) |
Use the antlions to kill 50 enemies. |
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Cache Checker (10) |
Find every radar cache in chapter Under The Radar. |
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Camera Shy (5) |
Detach security cameras from the walls. |
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Car Crusher (5) |
Use the cars to squash 15 antlions in Episode One. |
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Citizen Escort (15) |
Don't let any citizens die when escorting them to the escape train. |
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Conservationist (5) |
Kill five enemies with the same energy ball. |
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Containment (5) |
Contain the Citadel core. |
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Counter-Sniper (5) |
Kill all of the snipers in City 17. |
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Cupcake (10) |
Beat two Portal advanced maps. |
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Deadly Harvest (5) |
Kill an enemy by planting a hopper mine. |
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Defense of the Armament (20) |
Save the missile silo from the Combine offensive. |
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Defiance (5) |
Throw the trash at the guard in the beginning of HL:2 |
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Dynasty (10) |
Win 20 games. |
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Elevator Action (10) |
Survive long enough to get on the parking garage elevator. |
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Escape From City 17 (20) |
Escape City 17 with Alyx. |
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Fight the Power (10) |
Shut down the supression device by disabling its generators. |
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Flamethrower (5) |
Set five enemies on fire in 30 seconds. |
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Flushed (5) |
Kill an enemy with a toilet. |
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Follow Freeman (10) |
Gain command of a squad of rebels in the uprising. |
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Fratricide (5) |
Do whatever it takes to survive. |
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Friendly Fire (5) |
Knock down a turret with another turret. |
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Fruitcake (20) |
Beat four Portal advanced maps. |
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Get Some Grub (20) |
Squish every antlion grub in Episode Two. |
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Giant Killer (10) |
Survive the rooftop strider battle in the ruins of City 17. |
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Gordon Propelled Rocket (5) |
Unlock the rocket launcher lambda cache in chapter Under The Radar. |
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Grave Robber (5) |
Steal a Zombine's grenade. |
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Grey Matter (5) |
Get 25 headshots as a Sniper. |
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Gunishment! (5) |
Destroy the Combine Autogun thats in the Junkyard |
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Hack Attack! (5) |
Kill five enemies with a Manhack. |
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Hallowed Ground (5G) |
Escort Gregori safely through the church cemetary |
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Hard to Kill (10) |
Get five kills in a row without dying. |
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Hardcore (15) |
Accumulate 1000 total kills. |
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Head of the Class (5) |
Play a complete round with every class. |
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Heartbreaker (10) |
Complete Portal. |
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Heavy Weapons (5) |
Get the airboat's mounted gun. |
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Hit and Run (5) |
Run over 20 enemies with the car in Episode Two. |
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Hot PotatOwned (10) |
Kill a Combine soldier with his own grenade. |
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Impenetrable Defense (10) |
Successfully defend Dustbowl without giving up a capture. |
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Impossible Defense (30) |
Successfully defend Gravel Pit without giving up a capture. |
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Into the Breach (5) |
Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft. |
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Keep Off the Sand! (20) |
Cross the antlion beach in chapter Sandtraps without touching the sand. |
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Lab Rat (5) |
Acquire the fully powered Aperture Science Handheld Portal Device. |
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Lambda Locator (15) |
Find all lambda caches in Half-Life 2. |
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Lightning Offense (10) |
Win Well in 5 minutes or less. |
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Little Rocket Man (30) |
Send the garden gnome into space. |
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Live Bait (10) |
Help Alyx snipe 30 enemies in Episode One. |
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Long Jump (5) |
Jump 300 feet. |
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Malcontent (5) |
Escape the apartment block raid. |
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Master of Disguise (15) |
Trick an opposing medic into healing you. |
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Meet the Hunters (10) |
Survive the Hunter ambush with Alyx |
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Neighborhood Watch (35) |
Save all buildings outside the missile silo from destruction. |
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Nemesis (5) |
Get five revenge kills. |
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One Man Army (5) |
Destroy six gunships in Half-Life 2. |
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OSHA Violation (5) |
Kill 3 enemies using the crane. |
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Pacifist (10) |
Contain the Citadel core without killing any stalkers. |
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Partygoer (5) |
Make the correct party escort submission position decision. |
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Payback (10) |
Kill a Hunter with its own flechettes. |
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Pedal to the Metal (5) |
Beat DOG in a race to the White Forest base. |
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Pinata Party (5) |
Find and break every web cache in Episode Two. |
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Plaza Defender (10) |
Survive the generator plaza standoff in chapter Anticitizen One. |
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Powerhouse Offense (5) |
Win 2Fort with a shutout. |
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Puttin' On a Clinic (15) |
Defeat the chopper in Episode Two without any misses. |
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Quiet Mountain Getaway (10) |
Survive the Ambush in White Forest In |
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Relentless Offense (20) |
Win Hydro without giving up a capture. |
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Revenge! (10) |
Destroy the hunter-chopper in Half-Life 2. |
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Rocket Science (20) |
Earn silver medals on all Portal challenges. |
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Secondary Silo Secured (5) |
Secure the launch doors on missile silo 2. |
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Singularity Collapse (25) |
Destroy the Citadel's reactor core. |
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Submission (5) |
Put the trash in the garbage can in HL2. |
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Targetted Advertising (5) |
Pin a soldier to the billboard in chapter Highway 17. |
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Team Doctor (5) |
Accumulate 25000 heal points as a Medic. |
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Terminal Velocity (5) |
Fall 30,000 feet. |
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The One Free Bullet (40) |
Beat Episode One firing exactly one bullet. Grenade, crowbar, rocket, and Gravgun kills are okay! |
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Think Fast! (10) |
Kill an Elite Soldier with his own energy ball. |
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Trusty Hardware (5) |
Get the crowbar. |
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Turret (5) |
Accumulate 10 turret kills with a single turret. |
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Two Points (2) |
Use DOG's ball to make a basket in Eli's scrapyard. |
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Twofer (5) |
Defeat both antlion guards outside the White Forest |
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Vanilla Crazy Cake (30) |
Beat all six Portal advanced maps. |
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Vorticough (13) |
Discover the hidden singing vortigaunt cave in chapter Water Hazard. |
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Warden Freeman (10) |
Survive the second turret standoff in Nova Prospekt. |
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Watch Your Head! (5) |
Make it to the bottom of the Citadel's main elevator shaft in one piece. |
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What cat? (5) |
Break the mini-teleporter in Kleiner's lab. |
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Where Cubbage Fears to Tread (5) |
Defend Little Odessa from the Gunship Attack |
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With Friends Like these... (10) |
Play in a game with seven or more players from your friends list. |
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World Traveler (5) |
Play a complete game on every map. |
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Zero-Point Energy (5) |
Get the Gravity Gun in Black Mesa East. |
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Zombie Chopper (25) |
Play through Ravenholm using only the Gravity Gun. |
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Zombie-que (5) |
Use flares to light 15 zombies on fire. |
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