Sword Art Online: Fatal Bullet Game Endings Guide
True Ending
Earning this ending requires checking a few different boxes, first of though id suggest leaving this ending till last as if you were to earn it first, you would not be able to earn the other two endings until finishing a new game+ run. However with that said if you’re going to leave one of the ending achievements till new game+ make it one of the others since starting new game+ resets your character affinities, anyways, onto the requirements.
First of all, make sure you don’t complete the SBC Flugel main quests since doing so causes party members to leave and you might not have their affinities at the required level. Also if you get a message pop up when talking to ArFA-sys that mentions Kirito Mode becoming unavailable, do not progress past that point.
Second, get the ArFA-sys, Kureha, Zeliska, Itsuki, and Bazalt Joe characters to affection level 4 75% and view all of their green balloon events up to that point.
Third, get the Kirito, Asuna, Sinon, Premiere, Strea, Philia, Rain, Agil, Klein, Argo, Leafa, Lisbeth, Silica, and Yuuki characters to affection level 2 and do each of their green balloon events.
Fourth, if you haven’t already, go and clear Kirito mode so that you unlock getting the ArFA-sys Charm, this will trigger once you return to your normal game after finishing the mode and you go into your home while all the characters are at the appropriate affection levels.
Fifth, if you haven’t already, make sure you have done the subquests for Asuna, Agil, and Lisbeth for making an outfit, appraising an item and enhancing a weapon respectively.
Lastly, go murder that final boss, make sure not to let it carry out its big attack since this can cause a bad ending if you get hit by it, just hit its core with enough damage and you’ll stun it out of the attack.
Normal ending (Kureha’s death)
Simply fail to complete the conditions for completing the true ending and when you speak to your ArFA-sys before starting the final confrontation, select to protect Zeliska.
Normal ending (Zeliska’s death)
Simply fail to complete the conditions for completing the true ending and when you speak to your ArFA-sys before starting the final confrontation, select to protect Kureha.