NOTE: ALL the Cheat Codes can be entered multiple times. 

Cheat Codes (case insensitive): 
-------------------------------
diediediemydarling - Lose the Current Mission 
deadlineisnear W   - in the Current Mission 
glitteringprizes   - All Power-Ups: Enabled 
                     Grants 7 different Power-Ups with 99 ammo for each type 
                     (Can be used again to resupply you with 99 ammo)
                     (Only Enabled for the Current Mission) 
moremoreweapons    - All Missiles: Enabled 
                     Grants 5 different Missiles with 99 ammo for each type 
                     (Can be used again to resupply you with 99 ammo) 
                     (Only Enabled for the Current Mission) 
showmetheweapons   - All Weapons: Enabled 
                     Grants all 9 Main Weapons 
                     (Only Enabled for the Current Mission) 
igonnaliveforever  - All Lives: Enabled 
                     Should give you 10 Lives (the Maximum Number of Lives) 
                     (Can be used multiple times) 

invulnerability    - God Mode Toggle (on/off) 
                     First time enables, Second time disables