Tir Na Nog

Invincibility:
Load or reset the game, then execute the following BASIC commands before running or restarting the program.

POKE 43719,234
POKE 43720,234
POKE 43721,234

All doors unlocked:
Load or reset the game, then execute the following BASIC commands before running or restarting the program.

POKE 44731,76
POKE 44732,253
POKE 44733,174

Can walk off paths:
Load or reset the game, then execute the following BASIC commands before running or restarting the program.

POKE 43872,76
POKE 43873,117
POKE 43874,171
POKE 43919,32
POKE 43920,77
POKE 43921,174
POKE 43922,165
POKE 43923,165
POKE 43924,201
POKE 43925,1
POKE 43926,240
POKE 43927,30
POKE 43928,76
POKE 43929,173
POKE 43930,171

Smaller saved game file:
Load or reset the game, then execute the following BASIC commands before running or restarting the program.

POKE 2640,64
POKE 2642,31

Press [F1] through [F5] to restart after dying:
Load or reset the game, then execute the following BASIC commands before running or restarting the program.

POKE 36206,0

Unlimited lives:
Load or reset the game, then execute the following BASIC commands before running or restarting the program.

POKE 34202,200
SYS 2060