FFT, but if you are looking for a numbered one:

I liked FF7 for the fact that it left you wondering if humanity had been wiped out or not at the end of the game. With the whole compilation the afect is now completely lost, but there was always the nagging feeling in the back of my head that maybe things didn't work out so well after all.

All and all I liked it because even after I was satisfied the characters adventure was over it kept me thinking about it.