Orange Box

Hidden Left 4 Dead trailer

Remain idle at the game selection screen. After a few minutes, a demo video of one of the games will begin. After the video ends, wait for the next video to begin, which will be a Left 4 Dead trailer.

Half-Life 2

Level select

While playing the game, press Left(4), L1, Right(4), R1 to unlock all levels.

Invincibility

While playing the game, press L1, Up, R1, Up, L1(2), Up, R1(2), Up.

Restore health

While playing the game, press Up(2), Down(2), Left, Right, Left, Right, Circle, X to spawn a medpak that will restore 25 points of health.

Refill ammunition for current weapon

While playing the game, press Triangle, Circle, X, Square, R1, Triangle, Square, X, Circle, R1 to spawn an ammunition cartridge for your current weapon.

No clipping mode

While playing the game, press Up(3), L1, Up(3), R1, Up(2).

Enemies do not target you

While playing the game, press Down(3), L1, Down(3), R1, Down(2).

Wireframe cycle

While playing the game, press L1(2), R1(2), L1, R1, L1, R1, Left, Right.

AA

While playing the game, press Triangle, Up, Triangle, Right, Triangle, Down, Triangle, Left, Triangle, Up.

Kill

While playing the game, press L1, Down, R1, Down, L1(2), Down, R1(2), Down.

Alternate title screen

Successfully complete the game to alternate the title screen.

Getting past turrets and other dangerous enemies

When you need to run a long way and have some objects with you (for example, a non-explosive barrel), if you have the Gravity Gun, use it as cover, and run (while facing the enemy) to the other side. Then if possible, shoot the barrel at the enemy. Note: Make sure there is only one enemy when doing this. Also, make sure the object is indestructible, and most importantly, look at the enemy and see if you can kill it with one shot.

Half-Life 2: Episode One

Level select

While playing the game, press Left(4), L1, Right(4), R1 to unlock all levels.

Invincibility

While playing the game, press L1, Up, R1, Up, L1(2), Up, R1(2), Up.

Restore health

While playing the game, press Up(2), Down(2), Left, Right, Left, Right, Circle, X to spawn a medpak that will restore 25 points of health.

Refill ammunition for current weapon

While playing the game, press Triangle, Circle, X, Square, R1, Triangle, Square, X, Circle, R1 to spawn an ammunition cartridge for your current weapon.

No clipping mode

While playing the game, press Up(3), L1, Up(3), R1, Up(2).

Enemies do not target you

While playing the game, press Down(3), L1, Down(3), R1, Down(2).

Half-Life 2: Episode Two

Level select

While playing the game, press Left(4), L1, Right(4), R1 to unlock all levels.

Invincibility

While playing the game, press L1, Up, R1, Up, L1(2), Up, R1(2), Up.

Restore health

While playing the game, press Up(2), Down(2), Left, Right, Left, Right, Circle, X to spawn a medpak that will restore 25 points of health.

Refill ammunition for current weapon

While playing the game, press Triangle, Circle, X, Square, R1, Triangle, Square, X, Circle, R1 to spawn an ammunition cartridge for your current weapon.

No clipping mode

While playing the game, press Up(3), L1, Up(3), R1, Up(2).

Enemies do not target you

While playing the game, press Down(3), L1, Down(3), R1, Down(2).

Hidden pumpkins

Set the system date to October 31. After you are ambushed by Hunters and Combine at a big house, drive along the road. Near where the supply cache is found, you will see an old truck. Go up to it, and there will be lots of pumpkins lying on the ground.

Portal

Level select

While playing the game, press Left(4), L1, Right(4), R1 to unlock all levels.

Create box

While playing the game, press Down, Circle, X, Circle, Triangle, Down, Circle, X, Circle, Triangle.

Fire energy ball

While playing the game, press Up, Triangle(2), Square(2), X(2), Circle(2), Up.

Fire rocket projectile

While playing the game, press Up, Triangle(2), Circle(2), X(2), Square(2), Up.

Portalgun ID 0

While playing the game, press Up, Left, Down, Right, Up, Left, Down, Right, Triangle(2).

Portalgun ID 1

While playing the game, press Up, Left, Down, Right, Up, Left, Down, Right, Square(2).

Portalgun ID 2

While playing the game, press Up, Left, Down, Right, Up, Left, Down, Right, X(2).

Portalgun ID 3

While playing the game, press Up, Left, Down, Right, Up, Left, Down, Right, Circle(2).

Portal placement anywhere

While playing the game, press Triangle, X, Circle, X, Circle, Triangle(2), X, Left, Right.

Upgrade Portalgun

While playing the game, press Square, Circle, L1, R1, Left, Right, L1, R1, L2, R2.

Alternate title screen

Successfully complete the game to unlock the cake title screen.

ApertureScience.com login

The graffiti in the game are clues for the ApertureScience.com website. 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.

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.

Team Fortress 2

Faster construction

As an engineer, do not wait for your building. Just whack it with the wrench so that it builds faster.