Predator

Unlimited lives:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 5672,165

Cheat mode:
Load or reset the game, then execute the following BASIC commands before running or restarting the program.
POKE 5672,165
POKE 8861,173

Cheat mode (alternate):
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 12046,165

Unlimited bullets:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 4019,165

Unlimited grenades:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 4189,165