[user104658]

Originally Posted by Sullen Girl

aaaah i didn’t know emil was a boss fight

i love him

There's two, the first one is in his home and you have to do it as 9S (you have to hack a chest to trigger it) and then there's a second one in the desert against a tonne of absolutely massive Emil heads, you get the quest at the shopping mall thing after upgrading all weapons to lv.4.

The final one wraps up the Emil story content, it all gets very emotional .

You also need to get to, but deliberately FAIL the final part of the superboss fight to get ending "Y" - I'd say by far the hardest ending to get because of having to find and fully upgrade every weapon. If you're not after getting all endings just for completionists sake, I'd say just watch the fight / cutscene on YouTube.

Spoiler:

Or if you love Emil maybe not because it'll just be depressing