This film likely best accomplished by disassembling the video game into sprites to mix live-action with animation.

INT. - A HOUSE - A ROOM

A YOUNG MAN PLAYS NINTENDO. He has won and is watching the end sequence to NINJA GAIDEN. In the game, RYU’S FATHER DIES. RYU KISSES HIS GIRLFRIEND. THE YOUNG MAN is overcome with the mixture of pity, grief, and love.

YOUNG MAN
(imploring)
Ninja!

(beat, sobs)
GAIDEN!

RYU AND GIRLFRIEND STAND ATOP A CLIFF AS THE TOWER OF THE VILLAIN’S LAIR COLLAPSES. The young man is overcome with the necessity of revenge.

YOUNG MAN
(imploring)
Ninja!

(beat, heaving sobs, anger)
REVENGE!

The young man seizes his SAMURAI SWORD and dashes out of his house, RUSHING THROUGH ALL OF THE LEVELS AND BOSSES OF NINJA GAIDEN, ACROBATICS AND FOE-SLAUGHTERING JUST SO, TO ARRIVE AT THE END OF THE GAME. He stands atop the cliff watching the tower collapse as he himself DETERIORATES INTO A NERVOUS WRECK ALTERNATING IN GLORY/GRIEF/ANGER, REPEATING HIS SAME WORDS AS BEFORE.