Level select:
Enter DELBOY as a name on the high score screen. Press the first three function keys to advance to levels two, three, or four. Press [F7] to view the ending sequence. 

Level select (alternate):
Load or reset the game, then execute the following BASIC commands before running or restarting the program. Note: X represents a level number from 0 to 3. 

POKE 2203,X
SYS 2128 
Set number of lives:
Load or reset the game, then execute the following BASIC commands before running or restarting the program. Note X represents the desired number of lives 

POKE 2175,X
SYS 2128 
Unlimited lives:
Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 2358,234
POKE 2359,234
POKE 2360,234
SYS 2128 
Unlimited lives (alternate):
Load or reset the game, then execute the following BASIC command before running or restarting the program. 

POKE 1835,234 
Unlimited lives (alternate):
Load or reset the game, then execute the following BASIC command before running or restarting the program. 

POKE 2358,173 
Invincibility:
Load or reset the game, then execute the following BASIC command before running or restarting the program. 

POKE 4170,10 
Weapon select:
Load or reset the game, then execute the following BASIC commands before running or restarting the program. Note: X represents a weapon number from 1 to 5. 

POKE 2214,X
SYS 2128 
Unlimited time:
Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 3901,0
SYS 2128 
More pots:
Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 34042,255
SYS 2128 
Plant fires in opposite direction:
Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 7488,56
SYS 2128 
Zombies move up and down:
Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 7086,5
SYS 2128 
Zombies explode:
Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 7086,7 
SYS 2128 
Zombies move like devils:
Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 7086,10 
SYS 2128 
Zombies turn into gold, weapons and other items:
Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 7086,15 
SYS 2128 
Zombies turn into dolls:
Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 7086,18 
SYS 2128 
Zombies turn into phantoms:
Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 7086,19 
SYS 2128 
Zombies try to pull character down:
Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 7086,22 
SYS 2128 
Zombies take character to second level: 
Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 7086,23 
SYS 2128 
Zombies turn into dragon heads:
Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 7086,26
SYS 2128 
Zombies fly around:
Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 7086,27
SYS 2128 
More fires:
Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 7086,29
SYS 2128 
All monsters explode when weapon is fired: 
Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 4242,42
SYS 2128