Hello silverwater!
Thank you for playing. Hopefully the remainder of the story won't disappoint.
As for your request:
(Spoilers)
If you pick the following choices, you should be able to access the top branch:
* "Put the bag on the floor";
* "We’ll find an...arrangement.";
* "Woke him up.";
* "...him to be mine.";
* "Now that you mentioned the roller coaster...";
* "I know but I still want to treat you.";
* "I’ll scream if you don’t cooperate!";
* "I agree.";
* "...to keep him at my side.";
* "I have to beat you.";
* "It’s not whatever!";
* "I don’t know what to say...";
* "I wanted you to know.";
After picking the last choice, when the scene ends, you should be on the top branch. Do note that the choices above have Isaac be somewhat rude, controlling, and intolerant towards Elijah.
This is important for understanding the events on this branch.