The Last Ninja 1 Cheats & Codes for PC 

The Last Ninja is an action-adventure game originally developed and published by System 3 in 1987 for the Commodore 64. Other format conversions were later released for the Apple IIGS, MS-DOS, BBC Micro and Acorn Electron in 1988, the Apple II in 1989, the Amiga and Atari ST (as Last Ninja Remix) in 1990, and the Acorn Archimedes in 1991.
Cheat codes, console commands, secrets:
Not enough lives? Well, save your game and enter your hexstyle
editor with that saved game file open for editing. Change the
byte at offset 59(hex) to FF. The FF will give you 255 lives.
The bottom status screen will be cluttered with "lives", but they won't
affect the game.

Also, try this cheat for infinite lives - type the following
from the DOS prompt:

For the CGA version of this game, type:
ren c.exe cheater.cht
debug cheater.cht
e 9b50 90 90 90 90
Then type: w

For the EGA version of this game, type:
ren e.exe cheater.cht
debug cheater.cht
e 9f16 90 90 90 90
Then type: w

Then rename CHEATER.CHT back to its previous name.
Cheat codes, console commands, secrets and system requirements for The Last Ninja 1 free online.

Game description

Commodore 64, Apple IIGS, BBC Micro, Acorn Electron, MS-DOS, Apple II, Atari ST, Amiga, Acorn Archimedes
Game Developer:
System 3 Eclipse Software Design
Game Genre:
Action-adventure game
Game Series:
The Last Ninja
Game Mode:
Single player
Game Publisher: