Killing the last boss:
----------------------

When you get to the level "World's Collide" you will be close to the head boss. The head boss is called a Gene Worm, and to kill him you must shoot his eyes out with the 2 mounted laser
guns. When both eyes are shot out his stomach will open up and a large, pink, orb will show. Repeatedly shoot the orb until his eyes come back and then repeat the steps of shooting his eyes
and the orb until he dies.

Opponents ignore you:
---------------------
Enable Cheat mode. Then press ~ (tilde) and enter "/notarget" at the console window.

                                                Half-Life: Counterstrike
Multi-Player:
-------------
Comments:
To run console, put -dev -console after counterstrike.exe

Pull down console in game by pressing \"`\" key (The Key Below The Esc), type \"sv_cheats 1\" to activate the cheats.
\"impulse 101\" - Gives you $16,000 credit

Cheat Tip:
---------
*Note: for the cheats to work you must make sure the server has cheats on by opening console and then enter in "sv_cheats" and if its "1" then cheats are on.*
Cheat:
/impulse 101 = $1600.00

Air Walking:
------------
In assault map go to the hostage room ( Note: You need 2 people to do this) get 1 hostage or 2 to follow and ask your friend to squat on the floor below the window on top of you then throw a granede up the window and it will break open jump on your teamate's head then hostage jump on top of the window you will notice now u can swim up swim up for 3 seconds and press your left button now you will notice you can walk in the air and headshot your enemies

Game Tip:
--------

Type this to see people "glow" in the dark.
"lambert -1.01"
Type this to see people's kills and deaths.
"cl_hidefrags 0"

Cheat Mode:
----------
At the console on the server machine,
type sv_cheats 1 to enable the following "Codes":

Code Result
------------------------------------
changelevel (levelname) - Change Level
impulse101 - $16,000
givespaceweapon_awp - Arctic Sniper Rifle
sv_gravity (-999 to 999999) - Adjust Gravity
sv_aim - Auto-Aim Only With Sniper Rifle
give weapon_(weapon name) - Get (weapon name)
gl_zmax 0 - See and Shoot Through Walls
gl_zmax 3600 - Sets Walls Back to Normal

Go To Map:
----------
After activating cheat mode in the console with sv_cheats 1 you can change gravity with changelevel <mapname>. Example changelevel dust

Speed Upgraded:
---------------
To upgrade the speed of your movements in CounterStrike,go to your console and type
cl_forwardspeed 999. Repeat this with cl_sidespeed 999 and cl_backspeed 999...
This will make your movements faster than ever...

See Thru Wall:
--------------
Type gl_zmax 100

Hyper auto-aim:
---------------
First, type "sv_cheats 1" on the tilde key(~)then press enter.
Then, type "sv_clienttrace 9999" then press enter to become
hyper auto-aim. To bring it back to manual aim
type "clienttrace 0000"

Look Through Wall, Records:
--------------------------
Use the console first then type the following codes:
gl_zmax 0 = Look through walls like that gadget in the
latest James Bond movie.You could use an AWP and kill
the enemy through the wall which is sheilding him.
gl_zmax 3600 = To disable the cheat above.
cl_hidefrags 0 = To see other peoples records of kills
and deaths.

Key binding:
------------
To activate codes easier, bind them to keys. For example, type bind v "impulse 101" at the console window to bind the "$16,000" code to the "V" key.

Get 90 bullets for Usp.45 Pistol:
---------------------------------
Buy a MAC-10 and all its bullets, then buy a Usp.45 Pistol.

Get 120 bullets for Glock Pistol:
---------------------------------
Buy a MP5 and all its bullets, then buy a Glock Pistol. Note: If you already have it, you do not have to buy another one.

Get 98 bullets for Scout:
-------------------------
Buy a Scout, shoot one bullet and reload. Then, buy the bullets again.

Get 120 bullets for Steyr TMP:
------------------------------
Buy a MP5 and all its bullets, then buy a TMP.

Get 59 bullets for Usp.45 pistol:
---------------------------------
Buy a Usp pistol, shoot one bullet and reload. Buy the bullets again.

Get 89 bullets for H&K Sniper Rifle:
------------------------------------
Buy a scout and all the bullets. Shoot once, reload, and buy the bullets again. Then, buy a H&K sniper rifle.

Sniping Ak47:
-------------
Aim the crosshair in the middle of the enemy and shoot the bullets two by two.
When the crosshair becomes large, run and reload. The target should be dead after you
shoot the first two bullets.

Splatter bones and body tissue:
-------------------------------
Type bind backspace "impulse 102" at the console window, then press repeatedly press [Backspace] key and bones, tissue, and blood will scatter all over the place.

                                        Half Life: Opposing Force

Cheat Mode:
----------
Load game with the hl.exe -dev -console -game gearbox command line. Press ~ during game play and enter one of the following console commands to activate the corresponding cheat function.

Effect Code
-----------------------------------
All weapons and ammunition - impulse 101
God mode - /god
No clipping and flight modes - /noclip
Level select - /map <map name>
Spawn item - /give <item name>
Enemies ignore you - /notarget

Weapon select:
--------------
/GIVE WEAPON_X - give weapon X, where X equals:

GRAPPLE
KNIFE
PIPEWRENCH
EAGLE
M249
SNIPERRIFLE
DISPLACER
SHOCKRIFLE
SPORELAUNCHER

Get a gun at the beginning of the level:
----------------------------------------
At the beginning of the level where you reach the security guard, find a chair. It is easily moved. Move it to the door that he will open for you, and get him to open it. Slide the chair in between the doors, and it will not close. This may take a few tries. Go out, take the crowbar, charge
it up until you reach the same security guard, and hit him until he explodes. Then, get his pistol with the laser sight and continue the game.

Spawn Grunts:
-------------
Enable cheat mode, then use the impulse 76 code to activate the Grunt-O-Matic. A message to start a new game in order for it to work will appear. If you want to continue where you currently are, just quicksave, then quickload the game. Once you have quickloaded, type in the code again to spawn a Grunt. Note: You must have the nocliping code on before you spawn the grunt because he will be spawned close to you. If this is not done, a message stating that the monster spawned is stuck in a wall may appear and the game will end. Do not spawn the Grunt in a closed position or the same message will appear. The Grunt you spawn will see you as a hostile. To have more fun, use the /notarget code and spawn a number of grunts to do your alien hunting. The Grunts you spawn will look like the Grunts from the original Half-Life.

Hidden audio:
-------------
Approach the Boss of Opposing Force to hear backwards audio composed of the phrase "To win the game you must kill me Randy Pitchford" when played correctly. Randy Pitchford is the leader of the development team at Gearbox Software.
Original levels:
----------------
You can play all the Half-Life levels that Gordon Freeman went through as Adrion Shepard, but in the lab none of the scientists will talk to you.

------
Hints:
------
Save your ammo! If you can take out an enemy with the wrench, use it instead of unloading a clip.

Maintain control of the medic; if you "release" him, other grunts will yell for medical assistance and they'll take the medic's supply of shots, leaving you with nothing.

You can only use the Barnacle on organic materials--these are usually green, with small lumps. Latch onto them and climb away!

                                                      Half-Life: Redemption

Cheat mode:
-----------
Load game with the command line: hl.exe -dev -toconsole. Then, press ~ if the orange text on the screen does not disappear. During gameplay, press ~ to display the text prompt and type in sv_cheats 1. Press ~ and enter one of the following console commands to activate the corresponding cheat function.

Result Code
--------------------------------
God mode /god
No clipping mode /noclip
Opponents ignore character /notarget
All weapons and ammo impulse 101
Map select /map <map name>
Third person view /thirdperson
Adjust gravity sv_gravity <-999 - 999999>
Obtain item /give <item name>

Hidden door:
------------
Enable cheat mode, then activate the /map redE3M5 code to advance to episode 3, mission 5. Locate the door that does not have a handle in that level. Enter the /noclip code and walk through the door to find another door covered with smiley faces.