Stuck trying to get to true ending

[Silverfire32]

I've gone through every choice that I can see, but there's one of the "extra" chapters that's still locked (the Youdoneit, She and Ai, etc. chapters). I think that might be why I can't get a choice at the end, even though I've got the Re chapters up till the "kill Nikaido" choice done. I know the secret of Lowe, but still have no choice but to kill Nikaido.

I'm not sure where I need to go to unlock that missing extra chapter (IIRC, it's the second one down the list), so ... as much as I don't like asking for guidance in games like this, can anyone point me in the right direction?

PS. If it matters, I have the Quest 2 version of the game, but AFAIK, it should be identical.

[ZITAPIS]

Been a long time since i played this but maybe you missed a path that must be played in the original chapters?

[Silverfire32]

As far as I know, I did every path, but I can check yet again. The more I have to retrace looking for the *one* thing I missed, the less I enjoy it, though. ;)