Half-Life: They Hunger

Hint: Enabling the console window:
At the main menu, select "Configurations"< then "Controls". Find the sentence "Use voice communication" then set "V" as the key to bind it to. When you display the console window, you can now type on it.
Information in this section was contributed by Cooltom666.

Hint: Alternate Half-Life:
Type map c0a0 at the console window. You will start on Half-Life with the Half-Life: They Hunger weapons instead of the normal weapons. Some of the enemies are also different. For example, Gman is now the Sheriff. The Scientists are now civilians. Barney looks different, and the head crab zombies are now zombies from Half-Life: They Hunger. When you are playing in this state, the game autosaves when it touches a autosave trigger. The voices are the same. For example, the endgame level on Half-Life with Gman is the Sheriff, but Gman's voice plays on the Sheriff. Note: The Houndeyes on Half-Life are now zombie dogs, however they still use the Houndeye weapon that produces an electric field.
Information in this section was contributed by Cooltom666.

Hint: Map names:
Use the following entries with the map <name> console command.
Information in this section was contributed by Cooltom666.

Thintro
They1
They2
They3
They4
They5
They6
They7
They8
They9
They10
They11
They12
They13
They14
They15
They16
They17
They18
They19
They20
They21
They22
They23
They24
They25
They26
They27
They28
They29
They30
They30a
They31
They32
They33
They34
They35
They36
They37
They38
They39
They40
They41
They42
They43
They44
They45
They46
They47
They48
They49
They50
They51
They52
They53
They54
They55
They56

Glitch: Stuck in police station:
Go upstairs towards the three doors. When the lights turn off, use your flashlight and quickly go down the stairs into where you shot the orange buttons. If done correctly, you will hear a hit noise on you then the screen will turn black for a few seconds. The screen will return and you can see again. When you try to go back upstairs, you still do not get caught; you will have to restart to continue.
Information in this section was contributed by Cooltom666.

Glitch: Kill the pilot:
Go to the point where you see the pilot. Go onto the helicopter before the last two Bosses. Enter the god code in the console window, and drop off where the helicopter is located and find the pilot. Just as he is going onto the helicopter, kill him. Stay near the helicopter. If done correctly the "Your rescuer has died" message will not appear, and you can continue. When you go onto the helicopter, wait until you stop and go out of it. Look at the cockpit of the helicopter; the pilot is there again.
Information in this section was contributed by Cooltom666.

Glitch: Move without the zombie bull:
Enter the impulse 101 code in the console window at the point where you are taken by a zombie bull in a little carriage you cannot escape from. Kill the bull with a powerful weapon. After the bull is dead, you are still moving without a bull taking you.
Information in this section was contributed by Cooltom666.