While this achievement says to 'Watch' all seven endings, you do not need to actually watch them.
It is possible to get all endings in one playthrough, if you do all of the 'bowl' endings first (like the order I have them). As soon as the achievement pops for the required ending, you can pause and quit out. When you resume the game, it will be before the decision that determines the ending, so you can choose the other set of options.Although I recommend enjoying the game at least once with no guide and watching the endings all the way through, here is the fastest way to get all of the ending achievements, as well as the one for 'seeing' all 7 of them.
The 7 endings with how to get them are below (There may be other ways, but this is how I got them):
- Choose not to fight, so you go to the hospital - Choose Hainsworth's if given a choice.
- After Hospital, in the auction house...
- Talk to receptionist or go upstairs.
- Going upstairs is faster, as you mention mr. quinn, and get right to the elevator.
- If you talk to the receptionist, say you are there to pick up, and you don't have docs, and you want to talk to someone upstairs.
- Once in the elevator, go up
- When the guy confronts you at the computer, Continue to find the location
- Go down the elevator
- Carpark, and Act Normal
- Go instead of Hide
The specific ending requires the additional special decision below. Once it pops, pause, quit, and resume...or play through the game again, your choice:
When the calls come from May-Ling, continue to ignore them.
When May calls, answer, and choose Tchois.
When May calls, answer, and choose Parr. Toss the bowl to Parr.
When May calls, answer, and choose Parr. Place the bowl on the table.
You can get to the last set of endings many ways. You can follow the steps above, but fail to find the location at the auction house, or go straight to Parr's. The main thing is to not be in possession of the bowl, and do the extra steps listed below.
At Parr's, open the safe yourself. Don't accept the offer.
At Parr's, open the safe yourself. Accept the offer.
At Parr's, Let him open the safe. Shoot him.