I've discovered the ultimate path, 100% finished game. Solid play, although it opens up to various questions I'd die to find the answers!
Like for instance, who was responsible for Roswell's passing if you didn't get the Password. What happened to the Vault now that the gang didn't go there in the first place, did Memphis take it? And the most mind-boggling question of all...
Does Orlando have balls?
who was responsible for Roswell's passing
He himself - with an injection on day 5
What happened to the Vault
They send Memphis some picture who the vault gets opened and the "timemashine" does not work anymore.
Does Orlando have balls?
You played path B, didn't you? Orlando got enough balls to challenge his father. :)
Answer below:
It was Oswin. Original plan was for Roswell to use a sleepwalking Sal to kill him and then relied on the lack of recollection to have no one be able to piece it together. However, Oswin who was in the study intervened, and upon being unable to convince Roswell off his plan killed him in Sal's stead. Then, using Sal still sleepwalking to remove the axe from the scene, set up the book left in front of Roswell's body to assist Dave to potentially resonate with the event to circumvent it. Finally, he locked the door from the inside and then hid in the study, which the cast were unaware of existing, until they'd seen the body and moved on.