I'm having trouble with this too. I have all achievements except Liberty City Minute/ Key To The City/ Join The Midnight Club/ Top of the Midnight Club/ Wanted/ and Auf Wiedersehen Petrovic. I have done all activities with Packie, Brucie, and Little Jacob TWICE!! Won all games of bowling, pool, and darts. I'm at 99.5%. I've done checklist after checklist and still I don't get anywhere. WHAT AM I MISSING!! Any help would be greatly appreciated.