Point Prometheus

One tip to remember... Save the game before you enter ther elevator to confront Frank Fontaine. There is no way back and if you have no previous saves you will have to play the entire game over. This is the level where you have to become a Big Daddy to be able to get to Frank Fontaine.Once you becaome a Big Daddy,you have to escort a Little Sister.

Also while you are a Big Daddy enemies will not attack you (Unless you are protecting a Little Sister) This Is good for going back to previous levels and exploring or researching without battles.