Half Life 2: The Orange Box

Half Life 2: The Orange Box Achievement Guide

Guide By: Pyroman31
There are 99 achievements with a total of 1000 points.

Show/hide completed achievements Status: Visible
Show/hide secret achievements Status: Visible

Show / Hide Guide Road Map  

Estimated achievement difficulty: 7/10
Estimated time for 1000 : 30-60 hours (every game included)
Offline: 82 (830 )
Online: 17 (170 )
Minimum playthroughs: 4 (One for each single-player game.)
Missable achievements: Little Rocket Man and The One Free Bullet
Glitched achievements: None
Cheats disable achievements: Cheats do not disable achievements in Half-Life 2 and its episodes. However, cheats disable achievements in Portal.

The Orange Box has been acclaimed as perhaps the best video game deal in history. It comes with Half-Life 2, Half-Life 2: Episode One, Half-Life 2: Episode Two, Portal, and Team Fortress 2. With all these games, The Orange Box composes of 99 achievements. If you follow this guide, you will have no trouble reaching 1000 points.

If you have no shame when it comes to using cheat codes, then you'll be happy to hear that Half-Life 2 has some useful cheat codes to make your gaming experience much easier. This thread has cheats for Half-Life 2 and its episodes that can be entered at any moment. Also, in each game, you can check which achievements can be accomplished in your current title by pausing the game and selecting 'Achievements'. It's a nice little achievement tracker that will minimize confusion when it comes to distinguishing the achievements for each game.

Step #1: Half-Life 2
The first game that you should start out with is Half-Life 2. When you begin the game, turn the difficulty to Easy to minimize the game's difficulty. In the first chapter, be sure to save your game when the cop tells you to put the can in the trash. First, put the can in the trash to get the Submissive achievement. Next, reload your game, pick up the can, and throw it at the cop by hitting to unlock the satisfying Defiant achievement.

When you reach the the level "Red Letter Day", be sure to activate the mini-teleporter continuously until it blows up for the What cat? achievement.

Throughout Half-Life 2, there are hidden supply caches marked with the Greek Lambda logo. Here is a thread locating all of them for the Lambda Locator achievement.

If you follow the achievement guide below this road map, you will be able to get the rest of Half-Life 2's achievements with ease. However, one achievement to be wary of is the Keep Off the Sand! achievement. In the chapter "Sandtraps", you are required to not touch the sand. The best strategy is to save your game after each each tricky area. If you accidentally touch the sand, you will know because the earth will shake. If you hear the earth shaking, reload immediately. Sometimes, the antlions don't emerge from the sand. However, the antlions make an earth-trembling noise even if you barely touched the sand.

Step #2
: Half-Life 2 Episode One
After you have completed Half-Life 2, begin Episode One to continue the epic journey of Gordon Freeman. When you begin Episode One, be sure to put the game on Easy and to enter the invincibility cheat code if you want. The only achievement that is actually challenging in Episode One is the The One Free Bullet achievement. You are required to complete the game by only firing one bullet. However, with the invincibility cheat, this won't be much of a problem.

Be sure to fire your only bullet at the lock in the level "Lowlife". After that point, take out your gravity gun and have fun. By utilizing the invincibility cheat and by putting the game on Easy, you can practically run through the game. The One Free Bullet achievement will unlock after you get on the train at the end of the game.

The rest of Episode One's achievements are easily unlocked by simply following the achievement guide below this road map.

Step #3:
Half-Life 2 Episode Two
After you begin Episode Two, I advise you to turn the game on Easy and to re-enter the invincibility cheat again. Some of the achievements in Episode Two are harder than anything that has been previously experienced in Half-Life 2. By far the most challenging achievement in Episode Two is the Little Rocket Man achievement. You must find a garden gnome in a shack, take it through the entire game to reach a rocket, and put it inside the rocket.

For the Little Rocket Man achievement, when you and Alyx contact the White Forest base, look under a shelf in the shack to find the garden gnome. Take the garden gnome and carry it through the entire game. This can get tricky. However, the best tips for this achievement can be found in this thread.

Another tricky achievement is the Get Some Grub achievement. You are required to squish 333 antlion grubs in the first two chapters of Episode Two. Thankfully, someone on the forums has located all 333. Look at this thread.

The rest of Episode Two's achievements can be easily unlocked by following the achievement guide below this road map.

Step #4: Team Fortress 2
Now that you have fully completed Half-Life 2 and its episodes, it's time to have multiplayer fun! Team Fortress 2 has 17 multiplayer-based achievements. Luckily, some of these achievements can be unlocked via system link with no opponents. These achievements are Dynasty, Powerhouse Offense, Lightning Offense, Relentless Offense, Impenetrable Defense, Impossible Defense, Head of the Class and World Traveler. The remaining achievements can be easily be unlocked through boosting with friends. Use this thread to find other people willing to boost the remaining achievements.

Step #5: Portal
The last 14 achievements in The Orange Box are included in the mind-bending puzzler Portal. Some of these achievements are story-related and can not be missed. When you gain control of both portals, place one portal directly above you and one portal directly below you. Let yourself fall for a while to unlock the Terminal Velocity achievement. For the Long Jump achievement, follow this thread's advise.

After you complete the game, you will unlock advanced chambers and challenges. For the completion of the advanced chambers and the Vanilla Crazy Cake achievement, many gamers advise going to Youtube to watch strategy videos.

However, the final three achievements in Portal and in The Orange Box are the most difficult. You must get a gold medal on every challenge in Portal to get the Aperture Science achievement. For a great guide on this, go to this thread.

Well, that's it! If you have followed this road map, you should have finished The Orange Box with 1000 . I hope that you have enjoyed reading my road map as much as I have enjoyed writing it. Give yourself a pat on the back!

[x360a would like to thank Axe Argonian for this Road Map]

Bone Breaker5
Kill 30 enemies with thrown physics objects.   (1) 

Very easily done in Ravenholm, just pick up anything with the gravity gun and shoot it at enemies. It must kill them, not stun them. You will get little popups along the way(10/30 and 20/30).

Deadly Harvest5
Kill an enemy by planting a hopper mine.   (5) 

Easily gotten in the chapter, Anticitizen One. There are a few hoppers that you can set up before the first wave of enemies come at you. Just set them up at one or both ends where the force fields are at.

Hack Attack!5
Kill five enemies with a Manhack.   (7) 

After recieving the Gravity Gun, you will be able to use man hackers to your ability. Just pull them in and shoot them at an enemy to kill them.

Hot PotatOwned10
Kill a Combine soldier with his own grenade.   (2) 

When you get out of the tunnels of Ravenholm, you will come to train tracks guarded by snipers. Once you get past this, there will be a few guys, wait alittle bit and they will lob a grenade at you, pick it up with the Gravity Gun and shoot it back at their feet and viola!

Kill five enemies with the same energy ball.   (7) 

This applies to those energy balls floating for generators. Very easy when working your way into the Citadel. Pull one in, shoot it to kill an enemy, then pull it back, rinse and repeat till 5 are down.

Think Fast!10
Kill an Elite Soldier with his own energy ball.   (2) 

Exactly like Hot PotatOwned achievement but in a different location.

Grave Robber5
Steal a Zombine's grenade.   (1) 

In Episode 1 or 2, there will be zombies who used to be Combine soldiers. When they pull out a grenade, just use the gravity gun to take it away from them.

Use flares to light 15 zombies on fire.   (9) 

Easiest place is in the parking garage in Episode 1, right around when the lights go out waiting for the elevator. Plenty of zombies, a good few flares. The flares are usually lying on the ground. When you pick them up they will light automatically.

Escape the apartment block raid.    (1) 

Near the beginning of the game, you jump out of the window after talking to Barney and then you should get this one.

What cat?5
Break the mini-teleporter in Kleiner's lab.   (3) 

When you first enter his lab, the mini-teleporter is on the left with the plant inside it. Just keep making it go back and forth and eventually it will break and you will get this.

Trusty Hardware5
Get the crowbar.    (1) 

This will unlock once you receive the crowbar. Also works in Ep1 and Ep2.

Barnacle Bowling5
Kill five barnacles with one barrel.   

Easily done in the Chapter called Route Kanal. Awhile into the chapter you will come to a guy on a turret, take him out and follow the path into the muddy tunnel ahead. Once in there you will soon come to a tunnel with MANY barnacles in one spot and a explosive barrel right next to you. Simply shoot the barrel until it's on fire, then make it roll down into their line things and it will bring it up and it will soon explode.

Anchor's Aweigh!5
Get the airboat.    

Story related so you can't miss it. Once you jump into the airboat in the end of Route Kanal, you will get it.

Heavy Weapons5
Get the airboat's mounted gun.    

Also story related, you will get this attached to the airboat in the chapter called Water Hazard.

Discover the hidden singing vortigaunt cave in chapter Water Hazard.   (7) 

Here is a nice video showing the exact location of this guy in the very end of Water Hazard. But instead of using a modded weapon(like he did), just park the airboat under it and climb on it and jump up.

Destroy the hunter-chopper in Half-Life 2.    (3) 

At the end of Water Hazard, there will be a little battle with a chopper circling around. Just keep shooting it with the airboat's machine gun and avoid the little bombs. When it finally blows up, you will get this one.

Blast from the Past10
Find the HEV Suit Charger faceplate in Eli's scrapyard.   (5) 

When you first enter the scrapyard, look to your left. You will see a little ledge above you with a couple barrels on it. Just stack boxes with the gravity gun and when you get up there, you must pick it up with the Gravity Gun to get the achievement.

Zero-Point Energy5
Get the Gravity Gun in Black Mesa East.    

As soon as you get the Gravity Gun handed to you from Alyx, you will get this achievement.

Two Points2
Use DOG's ball to make a basket in Eli's scrapyard.   (5) 

When playing catch with DOG, it will throw the ball at you. Just look up to the right and you will see the hoop. Just keep shooting 'til goes in. You should get the achievement right after that.

Zombie Chopper25
Play through Ravenholm using only the Gravity Gun.   (14) 

Might sound alittle tough but it's not all that hard. Just keep finding saw blades, barrels, boxes, and anything else to pick up and shoot at enemies. If you stuck on a rooftop with no items to pickup and are being chased by enemies, just run from them...You can pull out other weapons but you just can't hit the Right Trigger. Even if you swing the crowbar to open boxes it will count as using another weapon.

OSHA Violation5
Kill 3 enemies using the crane.   

In the chapter, Highway 17, you will come to a magnetic crane in which you need to pick up the buggy and place it on the higher level. When you get into the crane, 3 guys will come out from the building and start shooting you. Just pick up a huge container, and start swinging it at them. You can also drop it on them to kill them as well.

Targetted Advertising5
Pin a soldier to the billboard in chapter Highway 17.   (2) 

Just before you cross the bridge to that farm with many foes, there is a big car pile up. If you look next to it, there is a hill with a tree on it. Get up the hill and there should be a corpse with the crossbow. The player should still be able to stick that guy from the hill provided they aim slightly above the target.

One Man Army5
Destroy six gunships in Half-Life 2.     (6) 

These ships are easier taken out by Rockets. It takes about 4-5 rockets to take one down. You have the entire game to do this so you should get it eventually. Once you kill any of them, a little popup will show your progress(1/6, 2/6, etc.)

Keep Off the Sand!20
Cross the antlion beach in chapter Sandtraps without touching the sand.   (17) 

Sorta difficult. When you come to the beach where you have to cross the sand that is infested with Antlions, find anything of use and use the gravity gun to make your own little pathway across the sand. If you happen to mess up, just reload an autosave and start again. The achievement will unlock, if done right, as you are on the hill RIGHT before the little battle with the Antlion Guard.

Bug Hunt10
Use the antlions to kill 50 enemies.   

In the chapter, Sandtrap, you will get Bugbait grenades. Just throw them on enemies and watch the antlions kill away.

Kill an enemy with a toilet.   (6) 

In the chapter, Nova Prospekts, there should be toilets in some of the cells so just pick it up with your trusty gravity gun and fire it at an enemy.

Warden Freeman10
Survive the second turret standoff in Nova Prospekt.    (6) 

Story related so you can't miss it.

"Radiation Levels Detected"5
Get through the toxic tunnel under City 17 in Half-Life 2.    

Story related so you can't miss it.

Plaza Defender10
Survive the generator plaza standoff in chapter Anticitizen One.    

Story related so you can't miss it.

Kill all of the snipers in City 17.   (2) 

You can easily find these guys from the blue laser their gun emites. Just kill them anyway possible. This is pretty much story related. Just lob a grenade in the windows.

Fight the Power10
Shut down the supression device by disabling its generators.    

Story related so you can't miss it.

Giant Killer10
Survive the rooftop strider battle in the ruins of City 17.    

Story related so you can't miss it.

Lambda Locator15
Find all lambda caches in Half-Life 2.    (9) 

Lambda locations can be found here:


Watch Your Head!5
Make it to the bottom of the Citadel's main elevator shaft in one piece.    

Story related so you can't miss it.

Contain the Citadel core.    

Story related so you can't miss it.

Contain the Citadel core without killing any stalkers.   (5) 

The stalkers that you can't kill are the two that are below the core. They are the bony skinny looking guys. Just don't kill them and shoot the energy balls in the opener things. Be quick because these guys disable them right after. When the core is contained and your gravity gun goes back to its original self, the achievement will unlock.

Car Crusher5
Use the cars to squash 15 antlions in Episode One.   (2) 

When the antlions are coming up from those holes, you have to plug them up by putting a car over it with the gravgun. Just keep pushing the car into antlions with the gravgun. You should get updates too(5/15 and 10/15).

Elevator Action10
Survive long enough to get on the parking garage elevator.    

Story related so you can't miss it.

Live Bait10
Help Alyx snipe 30 enemies in Episode One.   

After you kill the sniper in episode one, Alyx climbs up and gets it to back you up. Just run through the next part with only the gravity gun pushing the enemies into her path until she kills 30.

Destroy the gunship in the hospital attic.   

Story related so you can't miss it.

Citizen Escort15
Don't let any citizens die when escorting them to the escape train.   (9) 

Just try and take all the bullets that are fired at them and shoot back. Not quite that hard but will be a burden when one dies and you have to start over.

Escape From City 1720
Escape City 17 with Alyx.    

Story related so you can't miss it.

The One Free Bullet40
Beat Episode One firing exactly one bullet. Grenade, crowbar, rocket, and Gravgun kills are okay!    (18) 

Save the bullet for a lock later in the game. There is a lock that you need to break and shooting it is the only way. The lock is in the room you get pistol and shotgun on the "Lowlife" level on Episode One.

Acid Reflex5
Kill an acid antlion worker.   

These are the guys that shoot the acid at you. Just kill one and you will get it right after that.

Get Some Grub20
Squish every antlion grub in Episode Two.    (10) 

Just find all these little guys and shoot or smash them. There is about 333 of these guys so look in every nook or cranny or lockers. They make a buzzing noise if there is one near by. There are 93 Antlion Grubs in Chapter 1 and 240 Antlion Grubs in Chapter 2. We aren't going to list them all but here are what totals you should have.

-When you get to the Vortigaunt saving Alyx I had 93 grubs

-When you get to the weighted elevator I had 142 grubs

-When you get to the elevator with the Thumper I had 226 grubs

-When you get to the Acid-Lion guard (where the guard is first able to kill you) I had 263

The last grub is after the vortigaunts heal alyx.

Pinata Party5
Find and break every web cache in Episode Two.    (2) 

1. After entering the tunnels and coming to the first water hole it will be under water. before getting to the vortigaunt that is saving Alyx.

2. Right after leaving the vortigaunts that are saving Alyx and going into the tunnel with the main vortigaunt to get the extract. it will be on the wall.

3&4. After fighting the first wave of acid-lions there will be one and after fighting a second wave of Acid-Lions there will be another.

5. Later on down the same tunnel there will be a weapons cashe above head.

6-9. Will all be in the elevator room were you need to attach the gear (two above head and two on the walls).

Into the Breach5
Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.    

Story related so you can't miss it.

Hit and Run5
Run over 20 enemies with the car in Episode Two.   

When you get the car, just keep running over as much enemies as possible. You should get this in no time.

Puttin' On a Clinic15
Defeat the chopper in Episode Two without any misses.   (6) 

In the Chapter titled "Riding Shotgun", after your car breaks down, you will have to take down the chopper. When it drops the little bombs, pick it up with the gravgun and shoot it at the chopper. It will take 4-5 of these. If you miss just reload an autosave.

Cache Checker10
Find every radar cache in chapter Under The Radar.    (2) 

1. After getting back your car from the mechanic. drive through the slug then turn left. it will be in the van with a car wedge up on it.

2. After passing a water tower on the left hand side you will come to a building with a van that has run into the side of a building. go into the bluiding and there will be a legde you can not get to pull the big piece of metal leaving on it onto the floor then throw a grende under it the launch you up to the legde to flip switch.(you should also recieve the "Gordon Propelled Rocket" achievement)

3. Drive straight across the road into the boxcar yard and you will see a shed missing part of its roof in the back. go inside and you will see a saw blade in the floor pull it up to uncover the cashe.

4. After going through the tunnel and going up a curve hill there will be a tree log to your left. go behind it and there will be a small cave. go inside and there's your 4th cashe.

5. After fighting off the combine and powering down the fence to free your car. you will jump off a ramp and drive down another curve hill it will be on your right side behind some rocks. there will be an arrow pointing up. there are some rocks there to break the rope that has the cashe hanging on the tree. (i used the secondary fire on my smg to get it down)

Thanks to icedtea for these!

Gordon Propelled Rocket5
Unlock the rocket launcher lambda cache in chapter Under The Radar.    

After passing a water tower on the left hand side you will come to a building with a van that has run into the side of a building. go into the bluiding and there will be a legde you can not get to pull the big piece of metal leaving on it onto the floor then throw a grende under it the launch you up to the legde to flip switch.

Pedal to the Metal5
Beat DOG in a race to the White Forest base.   (3) 

Little harder if you are trying to get the gnome to the rocket. The gnome doesn't like to stay in the car if you are going fast...

Little Rocket Man30
Send the garden gnome into space.    (44) 

In Episode Two, find the Gnome in the communications shack in the begining of the game. He is hidden under a shelf. Keep the gnome with you until you get to the White Forrest Base and place it in the rocket with Lamarr. You must close the door after you place the Gnome inside the Rocket with Lamarr. The achievement will unlock once the door is closed.

Neighborhood Watch35
Save all buildings outside the missile silo from destruction.   (16) 

This is harder than just killing the striders. You must make sure you keep up and dont mess around cause the striders will destroy the building.

Strider 1: From Cranes, slow walking.
Strider 2: From Sawmill, fast walking and will destroy the Sawmill if you
aren't quick.
Strider 3: From Water Tower, slow walking.
Strider 4: Cranes, slow walking.
Strider 5: Sawmill, slow walking.
Strider 6: Water Tower, Slow walking.
Strider 7: Cranes, fast walking, heads to building to south of Cranes.
Strider 8: Water Tower, fast walking, heads to the building to south of the
Water Tower.
Short Break, stock up on supplies.
Strider 9: Cranes, slow walking.
Strider 10: Sawmill, slow walking.
Strider 11: Water Tower, slow walking.
Strider 12: Sawmill, slow walking.
Strider 13: Cranes, slow walking.

Kill a Hunter with its own flechettes.   (3) 

When a hunter is attacking you you should notice that it shots these little darts that blow up just use your gravity gun to pick up a box or another object. The hunter will shoot the boxes then throw the box at it and if it dies you should have the achievement.

Lab Rat5
Acquire the fully powered Aperture Science Handheld Portal Device.    (3) 

Story-related, can't miss it.

Do whatever it takes to survive.    (5) 

Story related so you can't miss it. You will get this when you drop your weighted companion cube into the incinerator.

Make the correct party escort submission position decision.    (3) 

Story related so you can't miss it. Near the very end you have to avoid the incinerator that the lift is heading too. Portal to the platform above it and you will get this one.

Complete Portal.    (2) 


Terminal Velocity5
Fall 30,000 feet.   (6) 

Easy. Just find a open spot with a tall roof. Shoot one portal right above you and then one at your feet. Fall for about 2-3 minutes and you will get this one.

Long Jump5
Jump 300 feet.   (5) 

Find a hallway with high walls. Shoot one portal high up on the wall and then one on the ground. Keep falling through the portals WITHOUT hitting the ground or walls. You will get it fairly shortly.

Beat two Portal advanced maps.   (2) 

After beating the game, you have the choice to replay 6 different chapters on advanced. Specific chapter guides will be included soon...

Beat four Portal advanced maps.   (1) 

After beating the game, you have the choice to replay 6 different chapters on advanced. Specific chapter guides will be included soon...

Vanilla Crazy Cake30
Beat all six Portal advanced maps.   (5) 

After beating the game, you have the choice to replay 6 different chapters on advanced. Specific chapter guides will be included soon...

Basic Science10
Earn bronze medals on all Portal challenges.   

*See Aperture Science*

Rocket Science20
Earn silver medals on all Portal challenges.   

*See Aperture Science*

Aperture Science40
Earn gold medals on all Portal challenges.   (22) 

Surprisingly, Youtube has many videos of people gold medalling challenges. Best best is to search there for your specific challenge.

Accumulate 10 turret kills with a single turret.   (8) 

All these can be done in player matches with friends. Just set up a turret in front of your friend's spawn and have him run out 10 times. Easy.

Get five revenge kills.   (2) 

All these achievements can be done in player matches with friends. Just have a friend kill you 5 times. He will be "DOMINATING" you. Then kill him and you will get a revenge kill. Repeat 4 more times.

Hard to Kill10
Get five kills in a row without dying.   (1) 

Easily achieved if you are the sniper and just stay back. Keep sniping from afar and you will get this in no time.

Master of Disguise15
Trick an opposing medic into healing you.   (3) 

Just go into a Player Match with a friend. One of you become a medic, one of you become a spy. Have the spy turn into someone else (Right on joypad) and the medic can now heal you. Achievement will unlock immediately.

With Friends Like these...10
Play in a game with seven or more players from your friends list.   (360) 

Post in the Achievement Trading Thread if you are looking for people to get this. You must play with 7 other people on your friend's list.

Win 20 games.    (1) 

Just keep playing and you will eventually reach 20 wins. Can be done easily in Player Matches with friends.

Accumulate 1000 total kills.   (30) 

One easy way of achieving this is to set up alot of turrets in every game. You should get it pretty soon if you have a fully upgraded turret on a map picking off enemies. This can be achieved in Player Matches with friends.

Powerhouse Offense5
Win 2Fort with a shutout.    

Can be done in Player Matches. Just invite some friends in and tell them to not score. Then have them let you score over and over to end the game in a shutout. Can also be done in system link with no opponents.

Lightning Offense10
Win Well in 5 minutes or less.    

Easily done in player matches with some friends who are willing to help. Can also be done in system link with no opponents.

Relentless Offense20
Win Hydro without giving up a capture.    

Easily done in player matches with some friends who are willing to help. Can also be done in system link with no opponents.

Impenetrable Defense10
Successfully defend Dustbowl without giving up a capture.   

Easily done in player matches with some friends who are willing to help. Can also be done in system link with no opponents.

Impossible Defense30
Successfully defend Gravel Pit without giving up a capture.    (1) 

Easily done in player matches with some friends who are willing to help. Can also be done in system link with no opponents.

Head of the Class5
Play a complete round with every class.    

Just keep switching off different classes everytime you complete a round. You will get alittle popup that lets you know how far you are. Can also be done in system link with no opponents.

World Traveler5
Play a complete game on every map.    

There is only 6 maps in the game so it can be done very quickly. Can also be done in system link with no opponents.

Team Doctor5
Accumulate 25000 heal points as a Medic.   (4) 

Just keep healing and killing enemies as much people as possible every game. You should get it soon. You can check your progress in the My Achievements menu in the start menu. You can get this from Player Matches with friends.

Set five enemies on fire in 30 seconds.   (3) 

Easily done in player matches with some friends who are willing to help.

Disintegrate 15 soldiers by throwing them into a Combine ball field.   

In the end of Half-Life 2, after you have entered the citadel and you lose all of your weapons except your gravity gun that will turn blue. You can now pick up soldiers and throw them into the ball generators. Do it 15 times and there you go.

Follow Freeman10
Gain command of a squad of rebels in the uprising.    

In the chapter Anticitizen One, you'll begin to gain controll of rebels for your squad. You should have a total of 4 when you meet up with the group that pulls down the monitor and that's when it unlocks.

Grey Matter5
Get 25 headshots as a Sniper.   (4) 

You can get it very quickly actually. Just snipe as many people as possible in the head. Can be done in Player Matches with friends. These don't have to be in one game, just over-time.

Camera Shy5
Detach security cameras from the walls.     (10) 

You must start from chapter 1 and go through the entire game and get them in ONE RUN. The counter resets to 0 when you beat the game. Chambers that are not listed below, don't have cameras that can be taken down.

Chamber 2
01) By the door.
02) By the first blue portal.
03) Above large window in the main chamber.

Chamber 3
04) By the puzzle sign.
05) By the orange portal.
06) By the exit.

Chamber 4
07) By the button.
08) By the exit.

Chamber 5
09) Above puzzle sign.
10) By the door.
11) By the exit.

Chamber 10
12 entry stairs

Chamber 11
13) Above top entry passage.
Chamber 13
14) In the top entry passage.
15) Outside the 1st door.
16) In the exit passage.

Chamber 15
17) On the entry passage.
18) On the back wall.
19) On the 2nd room side wall.
20) In the 3rd room top stairs.
21) On the lift room entrance.

Chamber 16
22) In the 1st room.
23) In the 2nd room.
24) On the wall behind 3rd turret.
25) Opposite of the button
26) Go through the button door and you'll see it.

Chamber 17
27) End of the 2nd ball corridor.
28) Above left door at cross roads.

Chamber 18
29) At turret chamber entrance.
30) In the flinging room.

Chamber 19
31) 1st room wall.
32) By the door button.
33) Moving platform section.

Friendly Fire5
Knock down a turret with another turret.   (3) 

Very easy to do. On the stage where there are many turrets, simply make a portal right above one turret, and then shoot another portal underneath the other turret and you will get it when it tips over.

Secret Achievements
Put the can in the trash.   (3) 

At the beginning of the game after talking to barney you will meet a combine soldier blocking your way and wanting you to pick a can that he knocked on the floor. Just pick it up and drop it into the trash.

Hit the trashcan cop with the can.   (4) 

Just like submissive but just a little different. At the beginning of the game after talking to barney you will meet a combine soldier blocking your way and wanting you to pick a can that he knocked on the floor. Just pick up the can and throw it at him instead of throwing it in the trash.

Hallowed Ground5
Escort Gregori safely through the church cemetery    

Story related so you can't miss it.

Where Cubbage Fears to Tread5
Defend Little Odessa from the Gunship Attack    

Story related so you can't miss it.

Singularity Collapse25
Destroy the Citadel's reactor core.    (4) 

Story related so you can't miss it.

Defeat both antlion guards outside the White Forest.   

Story related so you can't miss it.

Meet the Hunters10
Survive the Hunter ambush with Alyx.    

Story related so you can't miss it.

Destroy the Combine cannon in the junkyard.    (2) 

Story related so you can't miss it.

Quiet Mountain Getaway10
Survive the ambush at White Forest Inn.    

Story related so you can't miss it.

Secondary Silo Secured5
Secure the launch doors on missile silo 2.    

Story related so you can't miss it.

Defense of the Armament20
Save the missile silo from the Combine offensive.    (2) 

Story related so you can't miss it.

Game Info
Electronic Arts


US October 10, 2007

Resolution: 1080i
Sound: Dolby 5.1 Surround
Players: 1
Online Players : 2-16
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