Exolon

255 lives:
Load or reset the game, then execute the following BASIC commands before running or restarting the program.
POKE 2114,255
SYS 2061

Unlimited lives:
Load or reset the game, then execute the following BASIC commands before running or restarting the program.
POKE 7427,205
SYS 2061

Unlimited energy and missiles:
Load or reset the game, then execute the following BASIC commands before running or restarting the program.
POKE 7427,173
POKE 5650,173
SYS 2061

Unlimited energy:
Load or reset the game, then execute the following BASIC commands before running or restarting the program.
POKE 7651,205
POKE 5650,205
SYS 2061