To unlock all of the game's levels, insert the following button sequence on any stage while playing the game: Left, Left, Left, Left, L1, Right, Right, Right, Right, R1.
ApertureScience.com
The various grafitti in Portal can help you crack the code for the website www.aperturescience.com. Go to the website (it uses Shockwave Flash) and type in the command LOGIN.
The user name is CJOHNSON and the password is TIER3. Once you are in, you may type in HELP for a list of valid commands. Have fun!
Addition by PRO_GAMER_: You should also be able to login to aperturescience.com with the username GLADOS and the password PORTAL, as well.
Addition by red7ring: It actually doesn't matter what name you login with. You can login with any name you want. It's the password you insert that's important.
Addition by Spilled Salt: After logging in, type at the prompt "thecakeisalie" (minus the quotes). Doing so will unlock some secret messages for you to view.
Half-Life 2 Codes
Enter the code while playing Half Life 2. No specific requirements other then the game. Can be entered at any time on any level.
Code
Effect
Triangle, O, X, Square, RI,Triangle, Square, X, O, RI
Restores ammo for current weapon.
Up Up Down Down Left Right Left Right O Button X Button
Restores health by 25 points.
Left 4 Deadtrailer
To get a trailer for the upcoming Valve game Left 4 Dead, wait at the game selection screen (where you choose between Portal, Team Fortress, or Half-Life 2). After a few minutes you will be taken to a demo video of the three Orange Box games. Wait for the video to end, then wait again. The next time a video plays, it will be the Left 4 Dead trailer.
Portal: Alternate title screen
Successfully complete the game to see the cake title screen.
Portal: ApertureScience.com commands
After logging on to ApertureScience.com, type ? or LIB to see the following list of commands.
APPEND
ATTRIB
COPY
DIR
ERASE
FORMAT
INTERROGATE
LIB
PLAY
RENAME
TAPEDISK
Type DIR then type APPLY to take an application for entry into the "Enrichment Center".
Portal: ApertureScience.com hidden message
While logged into the ApertureScience.com site, type THECAKEISALIE to access an interesting message left by some employees.
Portal: ApertureScience.com login
The graffiti in the game are clues for the ApertureScience.com web site. Go to the site and enter LOGIN as a command. Enter CJOHNSON as a username and TIER3 as a password. After logging in, type HELP for a list of commands.
In addition to logging in as "CJOHNSON" (Chell), you can login as anyone desired by typing a username longer than two characters and using PORTAL as a password.
Portal: Box head pictures
On the level where you get the companion cube after you run past the energy balls and are in the room with the three elevators, there are two doors leading to a catcher, and a platform that is pushed out of the wall. Walk up to the platform that is pushed out. Crouch behind it and walk through the opening. On the left hand side are a group of pictures of people with boxes for heads and hearts around them.
Portal: Chamber 18
At the end of the advanced map for Chamber 18, you will have the same raised platforms as you did in the normal one except now after you leave the lower one, it falls into the toxic water. This forces you to be more precise with your portal jumps. However, you can get past this easily. Do the platform jumping as usual, but if you miss just land on the platform you came out of. You should be able to fire an opposite color portal at the wall where you entered this area, allowing you to go back to the start. All the platforms rise again and the portal is still where you left it. You can now fall into the pit again and be able to portal jump to the next ledge. This take longer but does not require precise timing.
Portal: Create box
Press Down, Circle, X, Circle, Triangle, Down, Circle, X, Circle, Triangle during game play.
Portal: Fire energy ball
Press Up, Triangle(2), Square(2), X(2), Circle(2), Up during game play.
Portal: Fun with turrets
You can pick them up, toss them around, make them fall indefinitely through two portals, drop a cube on them, etc. Also try the following. Use the incandescent particle field in front of the exit. The computer voice said before that all objects other than yourself and the portal gun will be destroyed. Pick up a turret and toss it into the energy field. The turret will say "ayayayay" as if being electrocuted and disintegrate.
Portal: Level select
Press Left(4), L1, Right(4), R1 during game play.
Portal: Objects through particle field
The primary objective is to create two portals, one on either side of the field. First, enable the "Portal anywhere" code. Then, shoot one portal on the ground where the particle field is in the middle of the portal. To do this, aim your portal gun as close to the bottom of the field as you can that will still create a portal. Shoot another portal on the ground so that when you look through that portal, the line of the particle field cuts across the portal. Try and enter through the portal on the elevator side without touching the field. Once this is achieved, you may now shoot the color portal below the particle field anywhere you can in the elevator room. You will now have two portals on either side of the field. However, do not touch the field or both portals will be erased. Simply go through the portal and you may bring objects (for example, the companion cube) through to the next level. Note: Be careful where you shoot the portal in the elevator room; if you go through it you may fall through the map.
Portal: Overheating Xbox 360
Play the level where you face off with the laser guided robots. Once you get past the first few robots, you must start dropping the boxes on the robots heads so that they fall over. In the little place that you find the first two boxes, crouch and walk behind where the boxes were. You will find a little room with odd music playing and graffiti on the walls that says things such as "The cake is a liar". There also seems to be an Xbox 360 with a pot inside of it. The Xbox 360 is overheating and boiling the water.
Portal: Still Alive song
Listen to the radio in the room you start out in. If the music sounds familiar, it is because the song is an up-tempo version of the "Still Alive".
Portal: Talking toilet
In the holding cell you start at, walk up to the toilet and press [Use]. After a flushing sound the toilet will say "Thank you for your obeisance".
Team Fortress 2: Faster construction
As an engineer, do not wait for your building. Simply whack it with the wrench so that it builds faster.
Team Fortress 2: Finding spies
When searching for spies, look out for certain disguises. If a spy is disguised as a scout, he will be moving slower that a usual scout would. If a spy is disguised as a medic, he will not have an ubercharge. Also, watch out for "teammates" closely following other teammates. Chances are they are trying to backstab them.
Be very observant of all your teammates. A spy will have your name when you see them. Make sure to check if anyone is following you for "no reason", or if someone is coming in the opposite direction of your base. Also be careful to talk to everyone. If the person does not talk to you, they either do not have a mic or is a spy. You could also shoot everyone you see. Teammates will not get hurt. If a spy is shot they will not show themselves; you must shoot them a good amount. If the bullets do not go through the "teammate", it is most likely a spy. Remember to look out for unusual movement. A spy disguised as a scout will be slower and spy disguised as a heavy will be faster. You also might want to set up a system where whenever someone sees a teammate they shoot a round off. Spies cannot shoot or their cover is blown. There is no reason for any teammate to follow you. Spies can also destroy sentries, espensers and other things without blowing their cover. If no one but you and someone else is around and your gun just got destroyed, open fire or beat him down with your wrench. Follow these tips and spies will be changing classes quickly. You can also play a spy a few times, to quickly learn the advantages and disadvantages of that class.
There are several ways to reveal an enemy spy. Walking into a spy will make him translucent for a moment. You can walk through teammates, but cannot walk through disguised enemy spies. Attack the spy if you come across him, as all he can do run away. Igniting a cloaked enemy spy will set him on fire and distinguishes him with an enemy-colored glow.
A spy disguised as a medic will not have the ubercharge/kritzkrieg percentage display under the name.
When disguised, the health shown for a spy is never in the red zone. If you see someone with health in the red, it is not a spy. If not, pay attention.
The spy is always showing the primary weapon for a particular class. They cannot show melee or secondary weapons. If one of your teammates is showing any other weapon, you can be sure that it is not a spy. The following is a list of the primary weapons for each class.
A spy cannot shoot or he will loose his cover. If a teammate does not seem to be shooting, it could be a spy.
If a teammate is voice chatting at the moment you see him without the "?" sign indicating this is happening, it is a spy.
This trick works when a teammate is dead. If you know that he just got killed but see him running near you, it is a spy. The same applies if he is calling "Medic" while the real one is dead.
This requires a medic with the upgraded syringes gun. Shoot some syringes at teammates. If one of them is showing the crosses indicating that you are hitting an enemy, it is a spy.
If you see a blue ball or a red ball near dispensers, it is a cloaked spy.
Team Fortress 2: Medic achievements
Autoclave : Assist in burning eight enemies with a single uber-charge on a Pyro.
Autopsy report: Provide an enemy with a freezecam shot of you taunting above their ragdoll.
Bedside manner: Be healing a teammate as he achieves an achievement of his own.
Big pharma: Assist a Heavy in killing thirty enemies, where neither of you die.
Blast assist: Assist in exploding five enemies with a single uber-charge on a Soldier.
Blunt trauma: Assist in punching out four enemies with a single uber-charge on a Heavy.
Chief of staff: Accumulate 10 million total heal points.
Consultation: Assist a fellow Medic in killing five enemies in a single life.
Doctor assisted homicide: Assist in killing 20 nemeses.
Double blind trial: Deploy an uber-charge within eight seconds of a nearby enemy medic deploying his.
FYI I am a medic: Use your Bonesaw to kill 5 enemy Spies who have been calling for "Medic!".
Family practice : Uber-charge ten of your Steam community friends.
First do no harm: Play a full round without killing any enemies and score the highest on a team of six or more players.
Ground rounds : Heal 200 teammates after they have called for "Medic!".
Group health: Work with two other medics to deploy 3 simultaneous uber-charges.
House call: Join a game that one of your friends is in and then deploy an uber-charge on him.
Hypocritical oath : Kill an enemy Spy that you have been healing.
Internal medicine : Extinguish 100 burning teammates.
Intern: Accumulate 7,000 heal points in a single life.
Quadruple bypass: Heal a teammate who is taking fire from four enemies at once.
Medical breakthrough: Assist in destroying eight enemy Engineer buildings with a single uber-charge on a Demoman.
Medical intervention: Save a falling teammate from dying on impact.
Midwife crisis: Heal an Engineer as he repairs his sentry gun while it is under enemy fire.
Preventive medicine : Block the enemy from capturing a control point with an uber-charged teammate.
Peer review : Kill fifty Medics with your Bone Saw.
Play doctor : In a team with no medics, be first to switch to Medic after a teammate calls "Medic!" then heal 500 health.
Surgical prep : Have an uber-charge ready before the setup phase ends.
Trauma queen: Deploy three uber-charges in less than five minutes and assist in five kills during that time.
Triage: Deploy an uber-charge on a teammate less than a second before they are hit by a critical explosive.
Placebo effect: Kill five enemies in a single life, while having your uber-charge ready, but undeployed
Sawbones: Hit enemies with your Bonesaw ten times in a row without dying or missing.
Second opinion: Uber-charge two teammates at once.
Specialist: Accumulate 10,000 heal points health in a single life.
Team Fortress 2: Stickies
If you play Demoman on a map with capture points, do not forget to put stickies on it. If an enemy walks on it, you can explode him with your stickies. However, do not be dead at that time because your bombs will be destroyed if you are killed.
You can also do high jumps with your stickies. Jump on one and detonate it. It will cost life but this can buy you some time for reaching places that only a Soldier or a Demoman can normally access (for example, the roof on Gravelpit, capture point B). Don't
Stickies are more efficient for destroying buildings than your normal grenades. It can be devastating if you are ubered.
