I Alien

Unlimited lives:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 5948,173

Unlimited energy:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 5829,173

Unlimited bullets:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 4992,173

Unlimited time:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 6369,173