https://www.lemon64.com/games/details.php?ID=1489
https://www.gamesdatabase.org/Media/SYSTEM/Sinclair_ZX_Spectrum/manual/Formated/Last_Ninja_2-_Back_with_a_Vengeance_-_1988_-_System_3_Software.pdf
https://www.gamesdatabase.org/game/commodore-64/last-ninja-2-back-with-a-vengeance
https://archive.org/details/c64man_last-ninja-2/page/n21/mode/2up?view=theater
https://www.c64-wiki.com/wiki/Last_Ninja_2