Nuclear Strike 64 

Level skip 
Enter "GZXCV" as a password.

Infinite attempts 
Enter "KPLYO" as a password.

Invincibility 
Enter "CPPLM" as a password.

Infinite ammunition 
Enter "FCQWH" as a password.

Infinite chaingun 
Enter "ZWDRM" as a password.

Infinite rockets 
Enter "JLWLD" as a password.

Infinite missiles 
Enter "MGMWS" as a password.

Infinite wingtips 
Enter "RFRBC" as a password.

Armor increased 50% 
Enter "PCPNL" as a password.

Quadruple damage 
Enter "BDGFK" as a password.

Double miles per gallon 
Enter "LLMMN" as a password.

Infinite fuel 
Enter "DRWCV" as a password.

Full map 
Enter "BNBMP" as a password.

Stealth mode 
Enter "JYMNT" as a password.
Note: Weapons will be disabled in this mode.

Debug menu 
Enter "HLNRU" as a password.

Agility 
Enter "GLCND" as a password.

Overhead view 
Enter "BGRZP" as a password