The Orange Box Cheats

Cheat: Full Ammo

If you're in need of ammunition for your currently-equipped weapon during any Half-Life 2 or Episode 1 or 2, insert the following code to max out your ammunition: Y, B, A, X, Right Bumper, Y, X, A, B, Right Bumper.

Note that you need to re-assign the Gravity Gun button (or clear it completely) or the code will add null ammo to the Gravity Gun.

Unlockable: All Stages

To unlock all of the stages in any game in the collection, insert the following code during gameplay: left, left, left, left, left bumper, right, right, right, right, right bumper. If executed correctly, you'll be able to select all stages from the main menu.

This cheat works for each game in the collection except Team Fortress 2.

Achievement Hint: Dancing Vortigaunt

You can find the "dancing" vortigaunt in Water Hazard at the part after you take down the chopper. Once you open the gate, look to the opposite side and you will see a pipe. Enter the pipe (which is difficult; try using something to stand on) and follow the passage until you see a friendly Vortigaunt who talks to you.

Secret Achievement: Defiant

One of the secret achievements is at the beginning of Half Life 2 when the Combine guard asks you to throw the can in the garbage, make sure to throw the can at the guard first.

Achievement Hint: Garden Gnome (Episode 2)

The gnome is in the room in the first chapter where Alyx tries to contact her dad. The gnome should be under the bed on the right hand side of the door you exit through. Don't forget to shut the hatch once you put him in the cannon or the achievement will not register.

Secret Achievement: Where Cubbage Dare Not Tread

On Highway 17, when you reach Colonel Cubbage and have to destroy the gunship, do so from the top floor of the house. I took the gunship out from up there and got the achievement.

Easter Egg: 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.

: After logging in, type at the prompt "thecakeisalie" (minus the quotes). Doing so will unlock some secret messages for you to view.