I was heavily inspired by Vermis 2 so I made my own manual in my own game.
I was heavily inspired by Vermis, but especially Vermis 2. Growing up, I used to use old Prima Games guidebooks as a way to play through the game. Even now, as an adult, I play a lot of games with a wiki.
I'm working on my own project, with the manual and guidebook built into the game. Here are a few pages.