 
           
               
               
                       
                      America - Front
 
                       
                      America - Back
 
        | Unlockable | How to Unlock | 
|---|---|
| "Radiation Levels Detected" (5) | Get through the toxic tunnel under City 17 in Half-Life 2. | 
| Acid Reflex (5) | Kill an acid antlion worker. | 
| Anchor's Aweigh! (5) | Get the airboat. | 
| Aperture Science (40) | Earn gold medals on all Portal challenges. | 
| Atomizer (10) | Disintegrate 15 soldiers by throwing them into a Combine ball field. | 
| Attica! (5) | Destroy the gunship in the hospital attic. | 
| Barnacle Bowling (5) | Kill five barnacles with one barrel. | 
| Basic Science (10) | Earn bronze medals on all Portal challenges. | 
| Blast from the Past (10) | Find the HEV Suit Charger faceplate in Eli's scrapyard. | 
| Bone Breaker (5) | Kill 30 enemies with thrown physics objects. | 
| Bug Hunt (10) | Use the antlions to kill 50 enemies. | 
| Cache Checker (10) | Find every radar cache in chapter Under The Radar. | 
| Camera Shy (5) | Detach security cameras from the walls. | 
| Car Crusher (5) | Use the cars to squash 15 antlions in Episode One. | 
| Citizen Escort (15) | Don't let any citizens die when escorting them to the escape train. | 
| Conservationist (5) | Kill five enemies with the same energy ball. | 
| Containment (5) | Contain the Citadel core. | 
| Counter-Sniper (5) | Kill all of the snipers in City 17. | 
| Cupcake (10) | Beat two Portal advanced maps. | 
| Deadly Harvest (5) | Kill an enemy by planting a hopper mine. | 
| Defense of the Armament (20) | Save the missile silo from the Combine offensive. | 
| Defiance (5) | Throw the trash at the guard in the beginning of HL:2 | 
| Dynasty (10) | Win 20 games. | 
| Elevator Action (10) | Survive long enough to get on the parking garage elevator. | 
| Escape From City 17 (20) | Escape City 17 with Alyx. | 
| Fight the Power (10) | Shut down the supression device by disabling its generators. | 
| Flamethrower (5) | Set five enemies on fire in 30 seconds. | 
| Flushed (5) | Kill an enemy with a toilet. | 
| Follow Freeman (10) | Gain command of a squad of rebels in the uprising. | 
| Fratricide (5) | Do whatever it takes to survive. | 
| Friendly Fire (5) | Knock down a turret with another turret. | 
| Fruitcake (20) | Beat four Portal advanced maps. | 
| Get Some Grub (20) | Squish every antlion grub in Episode Two. | 
| Giant Killer (10) | Survive the rooftop strider battle in the ruins of City 17. | 
| Gordon Propelled Rocket (5) | Unlock the rocket launcher lambda cache in chapter Under The Radar. | 
| Grave Robber (5) | Steal a Zombine's grenade. | 
| Grey Matter (5) | Get 25 headshots as a Sniper. | 
| Gunishment! (5) | Destroy the Combine Autogun thats in the Junkyard | 
| Hack Attack! (5) | Kill five enemies with a Manhack. | 
| Hallowed Ground (5G) | Escort Gregori safely through the church cemetary | 
| Hard to Kill (10) | Get five kills in a row without dying. | 
| Hardcore (15) | Accumulate 1000 total kills. | 
| Head of the Class (5) | Play a complete round with every class. | 
| Heartbreaker (10) | Complete Portal. | 
| Heavy Weapons (5) | Get the airboat's mounted gun. | 
| Hit and Run (5) | Run over 20 enemies with the car in Episode Two. | 
| Hot PotatOwned (10) | Kill a Combine soldier with his own grenade. | 
| Impenetrable Defense (10) | Successfully defend Dustbowl without giving up a capture. | 
| Impossible Defense (30) | Successfully defend Gravel Pit without giving up a capture. | 
| Into the Breach (5) | Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft. | 
| Keep Off the Sand! (20) | Cross the antlion beach in chapter Sandtraps without touching the sand. | 
| Lab Rat (5) | Acquire the fully powered Aperture Science Handheld Portal Device. | 
| Lambda Locator (15) | Find all lambda caches in Half-Life 2. | 
| Lightning Offense (10) | Win Well in 5 minutes or less. | 
| Little Rocket Man (30) | Send the garden gnome into space. | 
| Live Bait (10) | Help Alyx snipe 30 enemies in Episode One. | 
| Long Jump (5) | Jump 300 feet. | 
| Malcontent (5) | Escape the apartment block raid. | 
| Master of Disguise (15) | Trick an opposing medic into healing you. | 
| Meet the Hunters (10) | Survive the Hunter ambush with Alyx | 
| Neighborhood Watch (35) | Save all buildings outside the missile silo from destruction. | 
| Nemesis (5) | Get five revenge kills. | 
| One Man Army (5) | Destroy six gunships in Half-Life 2. | 
| OSHA Violation (5) | Kill 3 enemies using the crane. | 
| Pacifist (10) | Contain the Citadel core without killing any stalkers. | 
| Partygoer (5) | Make the correct party escort submission position decision. | 
| Payback (10) | Kill a Hunter with its own flechettes. | 
| Pedal to the Metal (5) | Beat DOG in a race to the White Forest base. | 
| Pinata Party (5) | Find and break every web cache in Episode Two. | 
| Plaza Defender (10) | Survive the generator plaza standoff in chapter Anticitizen One. | 
| Powerhouse Offense (5) | Win 2Fort with a shutout. | 
| Puttin' On a Clinic (15) | Defeat the chopper in Episode Two without any misses. | 
| Quiet Mountain Getaway (10) | Survive the Ambush in White Forest In | 
| Relentless Offense (20) | Win Hydro without giving up a capture. | 
| Revenge! (10) | Destroy the hunter-chopper in Half-Life 2. | 
| Rocket Science (20) | Earn silver medals on all Portal challenges. | 
| Secondary Silo Secured (5) | Secure the launch doors on missile silo 2. | 
| Singularity Collapse (25) | Destroy the Citadel's reactor core. | 
| Submission (5) | Put the trash in the garbage can in HL2. | 
| Targetted Advertising (5) | Pin a soldier to the billboard in chapter Highway 17. | 
| Team Doctor (5) | Accumulate 25000 heal points as a Medic. | 
| Terminal Velocity (5) | Fall 30,000 feet. | 
| The One Free Bullet (40) | Beat Episode One firing exactly one bullet. Grenade, crowbar, rocket, and Gravgun kills are okay! | 
| Think Fast! (10) | Kill an Elite Soldier with his own energy ball. | 
| Trusty Hardware (5) | Get the crowbar. | 
| Turret (5) | Accumulate 10 turret kills with a single turret. | 
| Two Points (2) | Use DOG's ball to make a basket in Eli's scrapyard. | 
| Twofer (5) | Defeat both antlion guards outside the White Forest | 
| Vanilla Crazy Cake (30) | Beat all six Portal advanced maps. | 
| Vorticough (13) | Discover the hidden singing vortigaunt cave in chapter Water Hazard. | 
| Warden Freeman (10) | Survive the second turret standoff in Nova Prospekt. | 
| Watch Your Head! (5) | Make it to the bottom of the Citadel's main elevator shaft in one piece. | 
| What cat? (5) | Break the mini-teleporter in Kleiner's lab. | 
| Where Cubbage Fears to Tread (5) | Defend Little Odessa from the Gunship Attack | 
| With Friends Like these... (10) | Play in a game with seven or more players from your friends list. | 
| World Traveler (5) | Play a complete game on every map. | 
| Zero-Point Energy (5) | Get the Gravity Gun in Black Mesa East. | 
| Zombie Chopper (25) | Play through Ravenholm using only the Gravity Gun. | 
| Zombie-que (5) | Use flares to light 15 zombies on fire. | 
| Total Sales | 0.02m Japan | 1.09m NA | 0.53m Europe | 0.17m Others | 1.82m Total | 
| 1 | n/a | 158,645 | n/a | 27,996 | 186,641 | 
| 2 | n/a | 46,646 | 46,049 | 15,728 | 108,423 | 
| 3 | n/a | 23,205 | 23,853 | 7,978 | 55,036 | 
| 4 | n/a | 14,959 | 9,868 | 4,246 | 29,073 | 
| 5 | n/a | 10,349 | 8,263 | 3,171 | 21,783 | 
| 6 | n/a | 9,285 | 6,376 | 2,677 | 18,338 | 
| 7 | n/a | 13,577 | 10,963 | 4,181 | 28,721 | 
| 8 | n/a | 9,105 | 17,488 | 4,454 | 31,047 | 
| 9 | n/a | 11,678 | 15,303 | 4,552 | 31,533 | 
| 10 | n/a | 12,502 | 18,199 | 5,169 | 35,870 | 
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                    Metroid33slayer
                   
                  posted 13/01/2012, 10:08
                   Half life 2 has still the best campaign in any FPS. Message | Report | 
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