Finished playing the newer version and from what I have seen while a lot of it is the same there are some things different like the creator said. As for the endings there are now 6 endings I will list them from best to worst and how to get them in detail.
1) Ultimate good ending With Sandra, Melissa, and Clara.
(Prereq you need to have gotten ending 3 to get this ending.)
A) After you done your second (or third if you didn't get ending 3 the first or second time) When you go get to party with your Samantha choose the revenge choice.
B) when it comes time to help or destroy mark choose to destroy him.
C) When it comes to the time to tell him what to say use the following choices
Make fun of his mother
make fun of his authority
tell him to calm down.
D) when you get the choice to forget his meds or give them choose to forget his meds
E) When the final choice of the game comes choose 1 last thing.
Do all this and you get the perfect ending
2) Very Good ending with Sandra, and Clara
Follow steps A B C and D like before however instead of choosing one last fling choose let her go.
3) Good ending With Clara
This ending can be gained on your very first playthrough. Meaning the Prereq and "A" aren't needed.
All that is needed for this ending is to follow steps B and C when doing your first playthrough.
If you are doing a second playthrough and already got ending three to get it again any combination will get it for you a second time.
1) Follow letters A, B, and C but when it comes to step D choose to give his meds and you will get this ending
2) If you choose one of the other two choices for choice (A) then you need to follow choices B and C and you will get this ending again.
4) Neutral ending
All you need to do for this ending is when (B) comes choose to help Mark and you will get this ending.
5) Bad ending Lite
Please note that this ending unless you delete the Persist file within your save folder you can only get this once. Meaning if you want to see this ending you need to delete your persist to watch it again. As for how you get this ending all you need to do is the following.
Step (A) doesn't matter (You can choose any of the choices when you are at the party)
Step (B) Choice to Destroy mark
Step (C) Get one or more of the triggers wrong
If you do this and it is your first time screwing up step C you will get the this ending.
6) Ultimate bad ending
Like the Ultimate good ending the Ultimate Bad Ending also has a PreReq and that Prereq is getting the bad ending.
To get this ending all you need to do is follow everything to get the first bad end, but make sure it is your second time or later doing so.
Doing this will get you the Ultimate bad ending.