raise your affinity level with all characters exclusive to SAO FB (including your ArFaSYS, Zeliska, Itsuki, and Bazalt Joe) they must be affinity level four with at least 75% progress

Classic SAO characters (meaning all other characters except Pitohui, Fukaziroh, LLENN, and M) must at least be at affinity level 2

after that you have to do all of the green speech bubble talk interactions with your SAO FB characters (This includes actually doing the date scenes)

after you've done that there shouldn't be any more green speech bubbles which means you should go home and that will activate a cutscene with your ArFaSYS

Make it to the final part of the game where you get the Dead All quest.

If you've seen the cutscene from step one then it will instantly change to a quest titled Fatal Bullet

this is the part where you fight the final boss fight it normally until we get to the final part and step

when the GM starts using that death ball move that you can't dodge and will trigger a cutscene (this happens when it's health bar is yellow)

Don't try to dodge it

instead of trying to dodge shoot him right in his open mouth through the shadow orb he will then enter a downed state and then you kill him, that's it

the rest of it's pretty self explanatory

I made this in less than ten minutes and it's just so nobody else gets confused by the same thing I got confused by, not being able to dodge the stupid shadow orb so hopefully some more people who aren't cheating can get the ending they deserve (: