TRUSTFELL NOTES
Isaac's room is ridiculously neat - you'll notice that there's nothing out of place and nothing looks cluttered. You can find most of his belongings in his trunk, though all the items he wanted to keep are in the closet. There are some notes laid out on his desk as well, addressed to the other people here (and one other person).
Those might not be the first things you see though, since there are the designs painted on two of the walls. You'll find yourself staring at a map of Amestris with certain cities labeled. Ishval is circled in red. Some of them have paper duct-taped nearby with Isaac's handwriting, written in code of course.
The second wall has a map of Central City with a familiar alchemical array painted through it in red. Three specific points are marked on this map and once again there's duct tape and paper containing notes on whatever it is this one's supposed to represent.
Inside the desk you can find an alarming amount of notes - they're written in Amestrian and coded in a cipher that involves numbers, letters, and mathematical equations. If you're able to figure out the cipher you're certainly welcome to read them! Otherwise these are coded to look like research notes on his alchemy.
Those might not be the first things you see though, since there are the designs painted on two of the walls. You'll find yourself staring at a map of Amestris with certain cities labeled. Ishval is circled in red. Some of them have paper duct-taped nearby with Isaac's handwriting, written in code of course.
The second wall has a map of Central City with a familiar alchemical array painted through it in red. Three specific points are marked on this map and once again there's duct tape and paper containing notes on whatever it is this one's supposed to represent.
Inside the desk you can find an alarming amount of notes - they're written in Amestrian and coded in a cipher that involves numbers, letters, and mathematical equations. If you're able to figure out the cipher you're certainly welcome to read them! Otherwise these are coded to look like research notes on his alchemy.

no subject
He's alright, pretty easy to talk to and interested in alchemy. I tried teaching him some of the basics, but he couldn't activate an array which seems to prove that alchemy can't be used here at all. I don't want to teach him anything more though, just in case.
I don't trust him. I don't trust anyone here.
WEEK 2
At least he didn't make fun of me for that stupid dare.
WEEK 3
Killed by Archie, but William started it. I thought he was an okay guy, but I guess I was wrong again. I said I'd stop trusting people, but maybe I should just stop liking people.
...He left me a letter. "You'll get out of here, I'm certain." Why the hell did you have to have faith in me? I would've been just fine being mad that you tried to kill Archie, but now...
Sorry, William. I don't know if I will make it out of here.
WEEK 6
I wrote a note to him too. We never did get to learn much about him, did we? I wonder why he was willing to kill us all to get out.