Добро пожаловать в наше сообщество
Хотите присоединиться к остальным нашим участникам? Не стесняйтесь зарегистрироваться сегодня.

The Orange Box Achievements


Известный испытуемый
Команда форума
15 Окт 2017

The Orange Box features numerous in-game Achievements throughout its five included games.

On its Xbox 360 release, the compilation contained 99 Achievements across all the games on the disc. On this platform, it has the most Achievements of any Xbox 360 game, with 99 of them. However it has only 1000 available Gamerscore points, whereas Dragon Age: Origins, Halo 3, and Gears of War 2 tie for the most Gamerscore points in a single game with 1750.

Upon the compilation's release on PC, only Half-Life 2: Episode Two, Portal, and Team Fortress 2 had Achievements, the Half-Life 2 and Half-Life 2: Episode One Achievements being exclusive to the Xbox 360. They were eventually implemented on Steam on May 26, 2010. The Nvidia Shield versions of the games also include Achievements.

Since Team Fortress 2 is not set in the Half-Life and Portal universe, its Achievements are not detailed here.


Any Half-Life 2 game406
Half-Life 227533 (Steam)
32 (Xbox 360)
Half-Life 2: Episode One17513 (Steam)
12 (Xbox 360)
Half-Life 2: Episode Two21023 (Steam)
19 (Xbox 360)
Portal175 (Xbox 360)
47500 (Nvidia Shield)
15 (Steam)
14 (Xbox 360)
7 (Nvidia Shield)


Any Half-Life 2 game​

There are 6 Achievements worth a total of 40 Gamerscore points shared by the three Half-Life 2 games in The Orange Box. In the console versions of the games, all six are attainable through Half-Life 2 alone, though they may also be unlocked in Episode One and Episode Two. On the PC and the Nvidia Shield, these Achievements are split between different games in the series, depending on which game uses the respective gameplay mechanics most extensively.

Cut Achievements
ImageAchievementOfficial descriptionPC gameScoreHow-to
Hlx kill enemies withphysics.png
Bone BreakerKill 30 enemies with thrown physics objects.Episode Two5GOnce Gordon gets the Gravity Gun he must use it to pick up items and kill 30 enemies with it (the Gravity Gun must be used for the fatal blow to count).
Hlx kill enemy withhoppermine.png
Deadly HarvestKill an enemy by planting a hopper mine.Episode Two5GOnce the Combine start using Hopper Mines, Gordon may pick them up with the Gravity Gun. Plant one in an enemy's path so that it activates to kill them. (The achievement will not unlock if the mine is thrown directly like a grenade; it must be planted then tripped.)
Hlx kill enemies withmanhack.png
Hack Attack!Kill five enemies with a Manhack.Half-Life 25G
1500 XP
Gordon must grab a Manhack with the Gravity Gun and use it to kill an enemy, either thrown as a projectile or held as a melee weapon. The achievement is cumulative; it is not necessary to kill five enemies using a single Manhack.
Hlx kill soldier withhisgrenade.png
Hot Potat0wnedKill a Combine soldier with his own grenade.Episode Two10GWhen a Combine soldier throws a grenade at Gordon, he must grab it with the Gravity Gun and fling it back. The original thrower must be caught in the blast for the achievement to unlock.
Hlx kill enemies withoneenergyball.png
ConservationistKill five enemies with the same energy ball.Episode One5GUsing the alt fire on the AR2 Pulse Rifle, or using the Gravity Gun to control one of many energy balls found in the Citadel (or one fired at him by a Combine Elite), this feat can be achieved by firing into a narrow area with 5 or more Combine soldiers and letting it bounce around, killing them. It is possible to catch and fire the same ball multiple times.
Hlx kill elitesoldier withhisenergyball.png
Think Fast!Kill an Elite Soldier with his own energy ball.Episode One10GCombine Elites will sometimes fire an energy ball at Gordon. When one does, Gordon must catch it with the Gravity Gun and fling it back. The specific Elite Soldier who fired the Energy Ball must be disintegrated in order for the achievement to unlock.
Hlx find onegman.png
Man of MysteryFind at least one G-Man. (No official description)Episode TwoSee the G-Man in one of his locations in Half-Life 2 or Episode Two.

Half-Life 2

Half-Life 2 has 32 Achievements with 275 Gamerscore points unique to it. The Nvidia Shield version contains all the Achievements from the PC version excluding "Lambda Locator", with 100000 XP attainable by unlocking all of them.

Cut Achievements
ImageAchievementOfficial descriptionScoreChapterHow-to
Hl2 put canintrash.png
SubmissivePut the can in the trash.5G
1500 XP
Point InsertionWhen instructed by a Civil Protection officer to pick up the soda can and put it in the trash, Gordon must do as he is told and dispose of the can.
Hl2 hit cancop withcan.png
DefiantHit the trashcan cop with the can.5G
1500 XP
Point InsertionWhen instructed by a Civil Protection officer to pick up the soda can and put it in the trash, Gordon must throw the can at him instead.
Hl2 escape apartmentraid.png
MalcontentEscape the apartment block raid.5G
1500 XP
Point InsertionStory related.
Hl2 break miniteleporter.png
What cat?Break the mini-teleporter in Kleiner's lab.5G
1500 XP
"A Red Letter Day" or EntanglementIf Gordon uses the mini teleport repeatedly, it will eventually break. Piling multiple objects on both ends or trying to teleport one large object might achieve this more quickly.
Hl2 get crowbar.png
Trusty HardwareGet the crowbar.5G
1500 XP
"A Red Letter Day"Story related.
Hl2 kill barnacleswithbarrel.png
Barnacle BowlingKill five barnacles with one barrel.5G
1500 XP
Route KanalWhile in the sewers Gordon will come to a downward ramp. An explosive barrel will be at the top. Gordon should roll or throw the barrel down so that it is picked up by one of the five barnacles at the bottom. If Gordon shoots the barrel as it nears the top, it will ignite and detonate shortly thereafter, killing the barnacles.
Hl2 get airboat.png
Anchor's Aweigh!Get the airboat.5G
1500 XP
Route KanalStory related.
Hl2 get airboatgun.png
Heavy WeaponsGet the airboat's mounted gun.5G
500 XP
Water HazardStory related.
Hl2 kill chopper.png
Revenge!Destroy the hunter-chopper in Half-Life 2.10G
3500 XP
Water HazardStory related boss fight.
Hl2 find vortigauntcave.png
VorticoughDiscover the hidden singing vortigaunt cave in chapter Water Hazard.13G
4500 XP
Water HazardGordon just has to meet the Singing Vortigaunt in his cave in a drain near the end of the chapter. Detailed instructions for finding him are on his page.
Hl2 get gravitygun.png
Zero-Point EnergyGet the Gravity Gun in Black Mesa East.5G
1500 XP
Black Mesa EastStory related.
Hl2 find hevfaceplate.png
Blast from the PastFind the HEV Suit Charger faceplate in Eli's scrapyard.10G
3500 XP
Black Mesa EastWhile in Black Mesa East's scrapyard where Gordon first gets the Gravity Gun, the face-plate can be found on the ledge from which Alyx instructs him to pull some barrels down from. Gordon may have to use some crates and other items to be able to reach the ledge. Once he's spotted the plate, the achievement will unlock.
Hl2 makeabasket.png
Two PointsUse DOG's ball to make a basket in Eli's scrapyard.2G
500 XP
Black Mesa EastWhen Dog's "ball" is available, Gordon needs to pick it up with the Gravity Gun and successfully shoot it through the large basketball hoop on the far wall of the scrapyard. A green light on the hoop will indicate success. The ball must enter from above, although it is possible to stack some objects near the hoop and simply drop the ball in.
Hl2 beat ravenholm noweapons.png
Zombie ChopperPlay through Ravenholm using only the Gravity Gun.25G
12000 XP
"We Don't Go To Ravenholm..."Gordon must exclusively use the Gravity Gun—he may not use any other weapon—throughout the Ravenholm chapter. (Using Grigori's various traps will not void this achievement, nor will the act of wielding/switching weapons.) If Gordon even swings his crowbar or fires a single shot from any other weapon in his inventory, regardless of whether he hits a target, the achievement is voided. If successful, the achievement will unlock once Gordon exits the mines into the railyard.
Hl2 beat cemetery.png
Hallowed GroundEscort Grigori safely through the church cemetery.5G
1500 XP
"We Don't Go To Ravenholm..."Story related.
Hl2 kill enemies withcrane.png
OSHA ViolationKill 3 enemies using the crane.5G
1500 XP
Highway 17Unlocked when Gordon uses the electromagnetic shipping crane to kill 3 Combine soldiers.
Hl2 pin soldier tobillboard.png
Targetted AdvertisingPin a soldier to the billboard in the chapter Highway 17.5G
1500 XP
Highway 17Near the Petroleum Station, visible from the hill where Gordon first finds the crossbow, there is a billboard in the distance. Using the crossbow's scope, Gordon will see a soldier standing in front of the billboard. A successful hit will pin the soldier to the billboard, unlocking the achievement.
Hl2 kill odessagunship.png
Where Cubbage Fears to TreadDefend Little Odessa from the gunship attack.5G
1500 XP
Highway 17Story related, also counts towards the One Man Army Achievement (see next item).
Hl2 kill threegunships.png
One Man ArmyDestroy six gunships in Half-Life 2.5G
1500 XP
Highway 17 and SandtrapsGordon must destroy all 6 combine gunships. The first one is fought at New Little Odessa, the second one is encountered on the road after leaving Dock 137, the third one on the bridge at Bridge Point, the fourth one on the lighthouse at Lighthouse Point and the last two are fought in the Nova Prospekt courtyard.
Hl2 beat donttouchsand.png
Keep Off the Sand!Cross the antlion beach in the chapter Sandtraps without touching the sand.20G
8000 XP
SandtrapsFrom the point where Gordon encounters the two stranded resistance members until the cliff before the Antlion Guard fight, Gordon must not touch the sand (regardless of whether or not it triggers an Antlion attack).
Hl2 kill enemies withantlions.png
Bug HuntUse the antlions to kill 50 enemies.10G
11000 XP
Sandtraps and Nova ProspektOnce Gordon gets the Bugbait he can use it to direct the Antlions to attack at enemies. There will be plenty more than 50 of them in the relevant chapters. The Antlions must kill all the enemies in the same playthrough of the game in order to get the achievement.
Hl2 kill enemy withtoilet.png
FlushedKill an enemy with a toilet.5G
1500 XP
Black Mesa East, Nova ProspektGordon must grab a toilet in Nova Prospekt with the Gravity Gun and fling it at an enemy, killing them. This can also be done in Eli's Scrapyard once the Headcrab Shell hits, as there is a toilet nearby.
Hl2 beat turretstandoff2.png
Warden FreemanSurvive the second turret standoff in Nova Prospekt.10G
3500 XP
EntanglementStory related.
Hl2 followfreeman.png
Follow FreemanGain command of a squad of rebels in the uprising.10G
3500 XP
Anticitizen OneStory related.
Hl2 beat toxictunnel.png
Radiation Levels DetectedGet through the toxic tunnel under City 17 in Half-Life 2.5G
1500 XP
Anticitizen OneStory related.
Hl2 beat plazastandoff.png
Plaza DefenderSurvive the generator plaza standoff in the chapter Anticitizen One.10G
3500 XP
Anticitizen OneStory related.
Hl2 kill allc1709snipers.png
Counter-SniperKill all of the snipers in City 17.5G
1500 XP
"Follow Freeman!"Gordon must throw grenades into the windows where the Combine Snipers are. This is mainly story related, but it is possible to miss a sniper and not get the achievement.
Hl2 beat supressiondevice.png
Fight the PowerShut down the suppression device by disabling its generators.10G
3500 XP
"Follow Freeman!"Story related.
Hl2 beat c1713striderstandoff.png
Giant KillerSurvive the rooftop strider battle in the ruins of City 17.10G
3500 XP
"Follow Freeman!"Story related.
Hl2 find alllambdas.png
Lambda LocatorFind all lambda caches in Half-Life 2.15G"A Red Letter Day" through "Follow Freeman!"Gordon simply has to grab any item in a found cache to have it recorded. The caches do not all have to be found in the same playthrough of the game.
Hl2 disintegrate soldiersinfield.png
AtomizerDisintegrate 15 soldiers by throwing them into a Combine ball field.10G
3500 XP
Our Benefactors and Dark EnergyUsing the enhanced Gravity Gun, Gordon has to pick up 15 Combine soldiers and throw them into ball generators.
Hl2 beat game.png
Singularity CollapseDestroy the Citadel's reactor core.25G
10000 XP
Dark EnergyStory related.
Hl2 float withairboat.png
Catching AirFloat five seconds in the air with the airboat.Water HazardCan be achieved at the dam before Black Mesa East.
Hl2 find allgmen.png
Eagle EyeFind all of the G-Man's appearances in Half-Life 2.Most chaptersSee the G-Man in all of his locations.
Hl2 kill bothprisongunships.png
Uninvited GuestKill both gunships in the Nova Prospekt courtyard.SandtrapsStory related.

Half-Life 2: Episode One

Half-Life 2: Episode One has 12 unique Achievements worth 135 Gamerscore points.

ImageAchievementOfficial descriptionScoreChapterHow-to
The One Free Bullet.jpg
The One Free BulletFinish the game firing exactly one bullet. Grenade, crowbar, rocket, and Gravity Gun kills are okay!40GWhole gameFrom the time Episode One starts, to its conclusion, only one shot must be fired. The only shot necessary is a padlock on a fence door. Gordon should let Alyx do most of the shooting instead. Awarded at the same time as Escape From City 17 if the conditions are met, the achievement is similar to the Zombie Chopper achievement from Half-Life 2, except that it must be kept up throughout the entire game. The rocket launcher, crowbar, grenades, and the Gravity Gun are allowed to be used. The crossbow is also forbidden.
Grave Robber.jpg
Grave RobberSteal a Zombine's grenade.5GMost chaptersWhen a Zombine pulls a grenade, Gordon must use the Gravity Gun to grab it and throw it.
Watch Your Head!.jpg
Watch Your Head!Make it to the bottom of the Citadel's main elevator shaft in one piece.5GUndue AlarmStory related. Gordon must use the gravity gun to deflect the falling debris before it hits and breaks the elevator. It is easy to miss one, so it is recommended to save after each successful deflection.
ContainmentContain the Citadel core.5GDirect InterventionStory related.
PacifistContain the Citadel core without killing any stalkers.10GDirect InterventionThere are 2 Stalkers in the core room that reset the Energy Ball holders with their lasers. To get the achievement Gordon cannot kill them, but instead has to move quickly after loading the two ball receptacles that are needed to cross any given bridge. If successful, the achievement is received at the same time as Containment.
Zombie-queUse flares to light 15 zombies on fire.5GLowlife, Urban FlightWhen Gordon picks up a flare, it ignites. Then, he can run up to any zombie and hold the flare against it, causing it to ignite. Gordon may also use the Gravity Gun to pick up and throw a flare. Each flare should be good for at least 2 zombies. There are three locations with flares in Episode One: Right after the train derailment and before the elevator in the City 17 Underground in Lowlife, and in the Hospital in Urban Flight.
Car Crusher.jpg
Car CrusherUse the cars to squash 15 antlions in Episode One.5GLowlife, Urban FlightGordon must kill 15 Antlions by using the Gravity Gun to push a car onto them.
Watch Your Head!.jpg
Elevator ActionSurvive long enough to get on the parking garage elevator.10GLowlifeStory related. Also a good time to get Zombie-que. The image is recycled from that of "Watch Your Head!".
Live Bait.jpg
Live BaitHelp Alyx snipe 30 enemies in Episode One.10GUrban FlightWhen Alyx grabs a sniper rifle, Gordon has to run around and draw enemies out into her view, letting her kill them instead of Gordon. He can use the Gravity Gun to remove obstacles so she can get a clearer shot as well.
Attica!Destroy the gunship in the hospital attic.5GUrban FlightStory related. Reference to Al Pacino's character shouting "Attica!" in Sidney Lumet's film Dog Day Afternoon.
Citizen Escort.jpg
Citizen EscortDon't let any citizens die when escorting them to the escape train.15GExit 17When escorting Citizens from Barney to the train in Exit 17, Gordon must not let any of them die. There are about four trips that must be made without a single Citizen death. It is possible to do this while going for The One Free Bullet, it just will not be as easy.
Escape From City 17.jpg
Escape From City 17Escape City 17 with Alyx.20GExit 17Story related.

Half-Life 2: Episode Two

There are 19 Achievements in Half-Life 2: Episode Two worth 210 Gamerscore points. One additional Achievement, "Gnome Alone", is exclusive to the PC version of the game.

ImageAchievementOfficial descriptionScoreChapterHow-to
Grave Robber.jpg
Grave RobberSteal a Zombine's grenade.5GAny chapter with a Zombine in itWhen a Zombine presents a grenade, Gordon must use the Gravity Gun to steal it from its hand.
Ep2 kill poisonantlion.png
Acid ReflexKill an acid antlion Worker.5GAny chapter with a Antlion Worker in itGordon must kill any of the Antlion Workers found in the Antlion caves. The name is a play on "acid reflux" and "reflex".
Ep2 kill allgrubs.png
Get Some GrubSquish every antlion grub in Episode Two.20GTo the White Forest, This Vortal Coil and Freeman PontifexWhen going through the first three chapters, Gordon must kill all 333 Antlion Grubs. Many guides can be found on the internet to help locate all of the grubs.
Ep2 break allwebs.png
Piñata PartyFind and break every web cache in Episode Two.5GTo the White Forest and This Vortal CoilGordon must go through the chapter breaking open all 9 Antlion Grub caches. The first is found during To the White Forest; the rest are found during This Vortal Coil.
Ep2 beat antlioninvasion.png
Into the BreachHelp Griggs and Sheckley hold off the antlion invasion inside the mine shaft.5GThis Vortal CoilStory related.
Ep2 beat antlionguards.png
TwoferDefeat both antlion guards outside the White Forest.5GFreeman PontifexStory related.
Ep2 kill enemies withcar.png
Hit and RunRun over 20 enemies with the car in Episode Two.5GRiding Shotgun, Under the Radar and Our Mutual FiendGordon must kill 20 enemies by running them over with the Muscle Car.
Ep2 beat hunterambush.png
Meet the HuntersSurvive the Hunter ambush with Alyx.10GRiding ShotgunStory related.
Ep2 kill chopper nomisses.png
Puttin' On a ClinicDefeat the chopper in Episode Two without any misses.15GRiding ShotgunWhen Gordon must kill the Hunter-Chopper by using the Gravity Gun to launch its mines back at it, if he does not miss any shots then the achievement will unlock. It is recommended the player save the game after each successful hit.
Ep2 kill combinecannon.png
Gunishment!Destroy the Combine Autogun in the junkyard.5GRiding ShotgunStory related.
Ep2 find allradarcaches.png
Cache CheckerFind every radar cache in chapter Under The Radar.10GUnder the RadarGordon must find all 5 caches in that chapter.
Ep2 beat rocketcachepuzzle.png
Gordon Propelled RocketUnlock the rocket launcher lambda cache in chapter Under The Radar.5GUnder the RadarThe second lambda cache that Gordon encounters is protected by a brief puzzle that requires him to use a grenade to fling himself onto a previously unreachable platform. Doing so successfully will unlock the achievement.
Ep2 beat racewithdog.png
Pedal to the MetalBeat DOG in a race to the White Forest base.5GUnder the RadarWhen the race with Dog starts, Gordon must beat him to White Forest base.
Ep2 beat whiteforestinn.png
Quiet Mountain GetawaySurvive the ambush at the White Forest Inn.10GUnder the RadarStory related.
Ep2 put iteminrocket.png
Little Rocket ManSend the garden gnome into space.30GBegins in To The White Forest, ends in Our Mutual FiendVery soon into the game, located in the communications center where Alyx first makes contact with White Forest, Gordon may crouch to find a Garden Gnome lying beneath a low platform. Escort this gnome through the bulk of the game until Gordon arrives at the missile silo at White Forest base. (It is not required that the gnome be with Gordon at all times; there are sections where the gnome can be left behind and retrieved later.) Gordon must place the gnome inside the rocket capsule and close the capsule door in order to unlock the achievement.
Ep2 beat missilesilo2.png
Secondary Silo SecuredSecure the launch doors on missile silo 2.5GOur Mutual FiendStory related.
Ep2 beat outland12 nobuildingsdestroyed.png
Neighborhood WatchSave all buildings outside the missile silo from destruction.35GOur Mutual FiendGordon has to destroy all of the Striders before they can blow up any buildings. Saving after each successful Strider defeat is recommended.
Ep2 beat game.png
Defensive of the ArmamentSave the missile silo from the Combine offensive.20GOur Mutual FiendIn what amounts to the final boss of Episode Two, the player must take down around ten striders before they reach White Forest. Doing so successfully will unlock this achievement.
Ep2 kill hunter withflechettes.png
PaybackKill a Hunter with its own flechettes.10GAny chapter with a Hunter in itWhen a Hunter fires its flechettes, Gordon must collect them using an object held by the Gravity Gun (such as a tire), then fire that object back at the Hunter in a kill shot. Note: not all objects with flechettes stuck into them will unlock this achievement.
Achievement Gnome Alone.jpg
Gnome AloneIf 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.N/AAny map loadedThis achievement is exclusive to the PC version of the game. It is awarded to any player who launches the game at any time after November 20, 2020. It is a reference to the real-world event in which Valve president Gabe Newell collaborated with the space launch service provider Rocket Lab to launch a replica of the Garden Gnome into space. The event itself was a homage to the Episode Two achievement "Little Rocket Man", which is obtained by leaving the gnome in the space-bound White Forest satellite so that it will be launched into space, as well as the Half-Life: Alyx achievement "Gnome Vault of My Own", in which the player must carry the gnome (or a gnome magnet) all the way from Russell's Lab to the Vault.


Portal has 14 Achievements worth 175 Gamerscore points and an additional Achievement only available in the Steam version of the game that was a part of the game's ARG. The Nvidia Shield version contains 7 Achievements worth 47500 XP. It lacks the Achievements related to the Advanced Chambers, which are not included in the Shield version, and Camera Shy.

ImageAchievementOfficial descriptionScoreChapterHow-to
Portal get portalguns.png
Lab RatAcquire the fully powered Aperture Science Handheld Portal Device.5G
7500 XP
Test Chamber 11Story related.
Portal kill companioncube.png
FratricideDo whatever it takes to survive.5G
7500 XP
Test Chamber 17Story related. Achieved after "euthanizing" the Weighted Companion Cube.
Portal escape testchambers.png
PartygoerMake the correct party escort submission position decision.5G
7500 XP
Test Chamber 19Story related. Achieved after escaping a fiery death at the metaphorical hands of GLaDOS.
Portal beat game.png
HeartbreakerComplete Portal.10G
7000 XP
End of Test Chamber 19Story related.
Portal infinitefall.png
Terminal VelocityFall 30,000 feet.5G
7500 XP
Any chapter where the Portal Gun is fully powered upSometime after upgrading the Portal Gun, Chell should look straight up and place a portal on the ceiling above, then look straight down and place the complimentary portal on the floor directly beneath herself. If done correctly, Chell will fall in an endless loop. It will take a few minutes to reach 30,000 feet and have the achievement unlock. It is important that Chell does not move, as this will break the loop.
Portal longjump.png
Long JumpJump 300 feet.5G
3000 XP
Any test chamber where the Portal Gun is fully powered upChell must fly 300 feet through the air with the aid of portals.
Portal beat 2advancedmaps.png
CupcakeBeat two Portal advanced maps.10GAny advanced mapsSelf-explanatory.
Portal beat 4advancedmaps.png
FruitcakeBeat four Portal advanced maps.20GAny advanced mapsSelf-explanatory.
Portal beat 6advancedmaps.png
Vanilla Crazy CakeBeat all six Portal advanced maps.30GAll advanced mapsSelf-explanatory.

Refers to a collection of cut GLaDOS voice lines which ramble on about a nonsensical cake recipe, during part of which she repeatedly says "vanilla crazy cake" in various ways. Some of these lines were modified and reused for the Cake Core.
Portal get allbronze.png
Basic ScienceEarn bronze medals on all Portal challenges.10GAll challenge mapsAfter completing the game proper, 6 maps can be replayed for 3 challenges each (Least Time, Least Portals and Least Footsteps), totaling 18. The player must win bronze medals in all 18 challenges in order to unlock the achievement. (Bronze is fulfilled if the player earns the better silver or gold medals.)
Portal get allsilver.png
Rocket ScienceEarn silver medals on all Portal challenges.20GAll challenge mapsRequires winning silver medals in all 18 challenge maps. This achievement stacks with Basic Science—if the player has won silver in all challenges except for one they haven't played yet, then they win silver on the 18th challenge (bettering bronze on the first attempt), both Achievements would unlock simultaneously.
Portal get allgold.png
Aperture ScienceEarn gold medals on all Portal challenges.40GAll challenge mapsRequires winning gold medals in all 18 challenge maps. This achievement stacks with Basic Science and Rocket Science.
Portal detach all cameras.png
Camera ShyDetach security cameras from the walls.5GTest Chambers 2-5, 10, 11, 13, 15-19Using portals, Chell must detach all 33 detachable cameras in the game, during a single playthrough. Chell will encounter some cameras attached to portal-proof surfaces; since they cannot be detached, they are not part of the requirement.
Portal hit turret with turret.png
Friendly FireKnock down a turret with another turret.5G
7500 XP
Any map containing Sentry TurretsRequires either picking up a turret and bumping it into another turret so it falls down and deactivates, or using portals to cause one turret to fall onto another, also ending in deactivation.
Portal transmission received.png
Transmission Received..?N/AEvery chamberSteam only. Requires finding the 26 radios and changing their frequency so that the red sprite turns green. See Portal ARG.