@SecurityWriter That's true, the game incentivizes finding everything through multiple visits, or repetition, than all at once, or "before moving on."

That said, though, I thought I had learned everything in single player... but when I switched to the multiplayer, I discovered how wrong I was. There were hidden paths I hadn't even imagined.

The game has also gotten some nice content and quality-of-life updates (it was pretty janky on release), including new expanded endings, so if you're looking for something to scratch that itch, it may be worth revisiting.