Hitman 2

Hitman 2 cheat codes: 
Open the file HITMAN2.INI and enable the console by setting the
following two lines:

EnableConsole 1
EnableCheats 1

Then, when in game open the console by pressing tilde key (~) and type in
the following cheats:

IOIRULEZ   - God Mode (on/off)
IOIGIVES   - All Weapons and Items
IOIHITLEIF - Health
IOISLO     - Slow motion (on/off
IOIER      - Bomb Mode (on/off)
IOIHITALI  - Ali Mode (on/off)
IOILEPOW   - Special attack Mode (on/off)
IOIGRV     - The force of gravity Mode (on/off)
IOINGUN    - Nail rifle
IOIPOWER   - Mega Power

NOTE:
Some have noted that you can simply type the codes in while playing
(with CAPS LOCK on) instead of using the console. If you have an US
keyboard, just write IOIRULEZ. On any other keyboard the z and y change
place so you have to type in IOIRULEY. Also, try not to enter them too
fast. Do it more or less slow.


Unlock All missions:
Open up Hitma2.ini and change the following line

DefaultScene=AllLevels/logos.gms

into

DefaultScene=AllLevels/levelmenu.gms

Start the game and you will get a level select menu,
with all the Missions unlocked.