Invincibility Cheats NTSC Version. 
Press R, Z, C-Down, R, C-Down at the mission selection screen.
The phrase "Ah, that's better" will be spoken to confirm correct code
entry. 
Invincibility Cheats PAL Version. 
press R, Z, C-Down, R(2). 
 

Unlimited ammunition NTSC Version. 
Press C-Up, Z, C-Left, Z, L at the mission selection screen. The
phrase "Ah, that's better" will be spoken to confirm correct code
entry. 
Unlimited ammunition PAL version. 
Press C-Up, Z, C-Left, Z, C-Left. 
 

Big hands mode (PAL version). 
Press C-Down, R, C-Right, C-Up, L at the mission selection
screen. The phrase "Ah, that's better" will be spoken to confirm correct
code entry. 
 

Big head and feet mode (PAL version). 
Press C-Down, C-Down, Z, C-Up, L at the mission selection screen.
The phrase "Ah, that's better" will be spoken to confirm correct code
entry. 
 

Bonus Level. 
Successfully complete the game and wait until the Infogrames logo
disappears after the ending credits. The development team will appear on
the Embassy level. Speak to all the people here and Ethan and Candace
will enter the room. 
 

7.65 silencer gun NTSC 
Press C-Up, L, C-Right, C-Left, C-Up at the mission selection
screen to receive this weapon with 30 rounds. The phrase "Ah, that's
better" will be spoken to confirm correct code entry. 
 

7.65 silencer gun PAL. 
Press C-Up, L, C-Right, C-Left, C-Down at the mission selection
screen to receive this weapon with 30 rounds. The phrase "Ah, that's
better" will be spoken to confirm correct code entry. 
 

9mm high-power gun NTSC. 
Press R, L, C-Down, C-Up, C-Up at the mission selection screen to
receive this weapon with 30 rounds. The phrase "Ah, that's better" will
be spoken to confirm correct code entry. 
 

9mm high-power gun PAL. 
press R, L, C-Down, C-Up, C-Down at the mission selection screen
to receive this weapon with 30 rounds. The phrase "Ah, that's better"
will be spoken to confirm correct code entry. 
 

Uzi NTSC. 
Press C-Right, C-Left, C-Right, C-Down, R at the mission
selection screen to receive this weapon with 30 rounds. The phrase "Ah,
that's better" will be spoken to confirm correct code entry. 
 

Uzi PAL. 
Press C-Right, C-Left, C-Right, C-Down(2) at the mission
selection screen to receive this weapon with 30 rounds. The phrase "Ah,
that's better" will be spoken to confirm correct code entry. 
 

Mini-rocket launcher NTSC. 
Press R, L, C-Left, C-Right, C-Down at the mission selection
screen to receive this weapon with 30 rockets. The phrase "Ah, that's
better" will be spoken to confirm correct code entry. 

Mission Impossible Cheats.

Mini-rocket launcher PAL. 
Press C-Up, L, C-Right, C-Left, C-Down at the mission selection
screen to receive this weapon with 30 rockets. The phrase "Ah, that's
better" will be spoken to confirm correct code entry. 
 

Turbo mode. 
Press C-Up, Z, C-Up, Z, C-Up at the mission selection screen. The
phrase "Ah, that's better" will be spoken to confirm correct code
entry. 
 

Mini Mode PAL. 
Press C-Down, Z, R(2), C-Up at the mission selection screen. The
phrase "Ah, that's better" will be spoken to confirm correct code
entry. 
 

Staff Mode. 
Wait a really long time in the Embassy Function, all the producers,
directors, artists, etc. (staff members) who made the game, will be
standing around in the level, instead of all the people who are supposed
to be in the level. 
 

Easy mode. 
Continuously tap C-Up, Z at the mission selection screen. Ethan
will rapidly say "Ah, that's better" during this time. If activated
correctly, game play will begin without turbo mode, but with almost
double health. Hits will also inflict less damage. 
 

Kid mode NTSC. 
Press C-Down, C-Up, R, L, Z at the mission selection screen. The
phrase "Ah, that's better" will be spoken to confirm correct code
entry. 
 

Kid mode PAL. 
Press C-Down, C-Up, R, C-Left, Z at the mission selection screen.
The phrase "Ah, that's better" will be spoken to confirm correct code
entry. 
 

Big Feet Mode NTSC. 
Press C-Down, R, Z, C-Right, C-Left at the mission selection
screen. The phrase "Ah, that's better" will be spoken to confirm correct
code entry. 
 

Big Feet Mode PAL. 
Press C-Down, R, Z, C-Right, R at the mission selection screen.
The phrase "Ah, that's better" will be spoken to confirm correct code
entry. 
 

Big Head Mode NTSC. 
Press C-Down, R, C-Up, L, C-Left at the mission selection screen.
The phrase "Ah, that's better" will be spoken to confirm correct code
entry. 
 

Big Head Mode PAL. 
Press C-Down, R, C-Up, R, C-Left at the mission selection screen.
The phrase "Ah, that's better" will be spoken to confirm correct code
entry.