Posted by GG-AngelThanatos
You will be given a choice to spare or kill Ann. Whichever one you choose, along with whether your choices thus far have been positive/negative, will decide which ending you get. Make a choice and watch the ending. THEN - after you've received your achievement for that ending, hit Continue instead of new game. Viola, you're at the Finale again! Take down Ann and make the opposite decision to see the alternate ending - and collect another 50 points without an entire second play through.