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