I got a few user tips on the Analogue: A Hate Story achievement guide and made some corrections to it accordingly.

• For “2 Girls, 1 Core”, you can still get this achievement after the reactor sequence. The key to actually getting it is in the achievement’s name – have both AIs copied to the same core, and show a certain sequence of messages to *Mute.
• Someone else told me that the “Abusive Jerk” achievement unlocks if you take the steps to complete *Hyun-ae’s route, and then decide to abandon her anyway. I originally thought you had to get her sufficiently mad at you to forcibly terminate your connection, but I can’t verify my original theory or the new one by myself, since I can’t re-acquire the achievements once I’ve unlocked them without opening up a brand new account. I may have to go to the Steam forums to get this one…

UPDATE 7/14/2012: Nope, I was right…you do have to get *Hyun-ae pissed off enough to kick you from the system.