Another hint for the secret rooms. Turn on the lamps you find; anything pointing at a wall is likely a secret room.

For the trumpet achievement, just go to the kitchens and eat all the food you can find. It will kick in once you have eaten about 3/4 of all food available.

I can't find Johns Audiolog 1/3. Anyone know which one on the map it is?

Author, can you please help me with thrumpet achievement? Where do you find beans in this game? D:

Hey, your Brig mask seems displaced in the nearby bathroom. Thanks for the guide, a great help!

You hear a tingleing noise when the room is near. Spread Fire with the Rifle was enough to find them.

Thanks, yeah. They're at the bottom which had me missing terribly. I was shooting too high up on the wall.

Thanks!

It's been a while now but iirc most of them are near the bottom of the wall, so you need to crouch to get in. And to open them you need to shoot that place first. Basically just find the wall that's indicated and shoot every part of it, you'll get it eventually.

Can you give some more hints on the secret rooms? I'm really at a loss for how to identify where they are.

Percise and informative. Great guide. Those secret rooms. Always heard the tingeling.

Thanks for the guide.