Achievements
Complete the following achievements to unlock Xbox Live Gamerscore points.Additionally there are eleven secret achievements, all of which are currently unknown.
Achievement | How to unlock |
---|---|
"Radiation Levels Detected"(5 points) | Get throughthe toxic tunnel under City 17 in Half-Life 2. |
Acid Reflex (5 points) | Kill an acid antlion worker. |
Anchor's Aweigh! (5 points) | Get the airboat. |
Aperture Science (40 points) | Earn gold medals on all Portal challenges. |
Atomizer (10 points) | Disintegrate 15 soldiers by throwing them into a Combine ball field. |
Attica! (5 points) | Destroy the gunship in the hospital attic. |
Barnacle Bowling (5 points) | Kill five barnacles with one barrel. |
Basic Science (10 points) | Earn bronze medals on all Portal challenges. |
Blast from the Past (10 points) | Find the HEV Suit Charger faceplate in Eli's scrapyard. |
Bone Breaker (5 points) | Kill 30 enemies with thrown physics objects. |
Bug Hunt (10 points) | Use the antlions to kill 50 enemies. |
Cache Checker (10 points) | Find every radar cache in chapter Under The Radar. |
Camera Shy (5 points) | Detach security cameras from the walls. |
Car Crusher (5 points) | Use the cars to squash 15 antlions in Episode One. |
Citizen Escort (15 points) | Don't let any citizens die when escorting them to the escape train. |
Conservationist (5 points) | Kill five enemies with the same energy ball. |
Containment (5 points) | Contain the Citadel core. |
Counter-Sniper (5 points) | Kill all of the snipers in City 17. |
Cupcake (10 points) | Beat two Portal advanced maps. |
Deadly Harvest (5 points) | Kill an enemy by planting a hopper mine. |
Dynasty (10 points) | Win 20 games. |
Elevator Action (10 points) | Survive long enough to get on the parking garage elevator. |
Escape From City 17 (20 points) | Escape City 17 with Alyx. |
Fight the Power (10 points) | Shut down the supression device by disabling its generators. |
Flamethrower (5 points) | Set five enemies on fire in 30 seconds. |
Flushed (5 points) | Kill an enemy with a toilet. |
Follow Freeman (10 points) | Gain command of a squad of rebels in the uprising. |
Fratricide (5 points) | Do whatever it takes to survive. |
Friendly Fire (5 points) | Knock down a turret with another turret. |
Fruitcake (20 points) | Beat four Portal advanced maps. |
Get Some Grub (20 points) | Squish every antlion grub in Episode Two. |
Giant Killer (10 points) | Survive the rooftop strider battle in the ruins of City 17. |
Gordon Propelled Rocket (5 points) | Unlock the rocket launcher lambda cache in chapter Under The Radar. |
Grave Robber (5 points) | Steal a Zombine's grenade. |
Grey Matter (5 points) | Get 25 headshots as a Sniper. |
Hack Attack! (5 points) | Kill five enemies with a Manhack. |
Hard to Kill (10 points) | Get five kills in a row without dying. |
Hardcore (15 points) | Accumulate 1000 total kills. |
Head of the Class (5 points) | Play a complete round with every class. |
Heartbreaker (10 points) | Complete Portal. |
Heavy Weapons (5 points) | Get the airboat's mounted gun. |
Hit and Run (5 points) | Run over 20 enemies with the car in Episode Two. |
Hot PotatOwned (10 points) | Kill a Combine soldier with his own grenade. |
Impenetrable Defense (10 points) | Successfully defend Dustbowl without giving up a capture. |
Impossible Defense (30 points) | Successfully defend Gravel Pit without giving up a capture. |
Into the Breach (5 points) | Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft. |
Keep Off the Sand! (20 points) | Cross the antlion beach in chapter Sandtraps without touching the sand. |
Lab Rat (5 points) | Acquire the fully powered Aperture Science Handheld Portal Device. |
Lambda Locator (15 points) | Find all lambda caches in Half-Life2. |
Lightning Offense (10 points) | Win Well in 5 minutes or less. |
Little Rocket Man (30 points) | Send the garden gnome into space. |
Live Bait (10 points) | Help Alyx snipe 30 enemies in Episode One. |
Long Jump (5 points) | Jump 300 feet. |
Malcontent (5 points) | Escape the apartment block raid. |
Master of Disguise (15 points) | Trick an opposing medic into healing you. |
Neighborhood Watch (35 points) | Save all buildings outside the missile silo from destruction. |
Nemesis (5 points) | Get five revenge kills. |
One Man Army (5 points) | Destroy six gunships in Half-Life2. |
OSHA Violation (5 points) | Kill 3 enemies using the crane. |
Pacifist (10 points) | Contain the Citadel core without killing any stalkers. |
Partygoer (5 points) | Make the correct party escort submission position decision. |
Payback (10 points) | Kill a Hunter with its own flechettes. |
Pedal to the Metal (5 points) | Beat DOG in a race to the White Forest base. |
Pinata Party (5 points) | Find and break every web cache in Episode Two. |
Plaza Defender (10 points) | Survive the generator plaza standoff in chapter Anticitizen One. |
Powerhouse Offense (5 points) | Win 2Fort with a shutout. |
Puttin' On a Clinic (15 points) | Defeat the chopper in Episode Two without any misses. |
Relentless Offense (20 points) | Win Hydro without giving up a capture. |
Revenge! (10 points) | Destroy the hunter-chopper in Half-Life2. |
Rocket Science (20 points) | Earn silver medals on all Portal challenges. |
Targetted Advertising (5 points) | Pin a soldier to the billboard in chapter Highway 17. |
Team Doctor (5 points) | Accumulate 25000 heal points as a Medic. |
Terminal Velocity (5 points) | Fall 30,000 feet. |
The One Free Bullet (40 points) | Beat Episode One firing exactly one bullet. Grenade, crowbar, rocket, and Gravgun kills are okay!. |
Think Fast! (10 points) | Kill an Elite Soldier with his own energy ball. |
Trusty Hardware (5 points) | Get the crowbar. |
Turret (5 points) | Accumulate 10 turret kills with a single turret. |
Two Points (2 points) | Use DOG's ball to make a basket in Eli's scrapyard. |
Vanilla Crazy Cake (30 points) | Beat all six Portal advanced maps. |
Vorticough (13 points) | Discover the hidden singing vortigaunt cave in chapter Water Hazard. |
Warden Freeman (10 points) | Survive the second turret standoff in Nova Prospekt. |
Watch Your Head! (5 points) | Make it to the bottom of the Citadel's main elevator shaft in one piece. |
What cat? (5 points) | Break the mini-teleporter in Kleiner's lab. |
With Friends Like these.. (10 points) | Play in a game with seven or more players from your friends list. |
World Traveler (5 points) | Play a complete game on every map. |
Zero-Point Energy (5 points) | Get the Gravity Gun in Black Mesa East. |
Zombie Chopper (25 points) | Play through Ravenholm using only the Gravity Gun. |
Zombie-que (5 points) | Use flares to light 15 zombies on fire. |