Maid of Sker

I was able to get Dodgy Geezer at the same time as Luddite. When you pick up the modulator angle right and hold your breath while the first enemy passes, sneak out. To exit the Graveyard, hit the gate switch for the second time (when it’ll make noise) when the closest enemies are as far as they can get from you, you’ll have time to get to the door without getting hit. Use that same strategy when putting in the last piece to call the elevator, wait until enemies are down the hall, they don’t teleport to you, you can get to the elevator before they run back down the hallway to you. Finally on the second floor you need to beat the big guy. He only takes two hits on Easy. I opened the door to the left of the switch and but not to the right, then looped through the dining room and back to the switch. I played on normal the first time so he seemed so slow on Easy. Not sure if getting hit by the weapon that hurts him counts as getting hit, check your Stats on the pause screen before saving. After you save and move, he’ll get up again, just head straight for the Bird Key door in the Northeast, walk mostly, sneak past the sole patrolling enemy. He’ll be behind you the whole way and is unlikely to spot you.

I’d done collectibles previously so ignored them and didn’t go for the extra two music sheets.

If you get all the charges it is possible to get the phonic boom achievement in the same run. Save after you get the last charge then use them all at once, after the achievement pops don't save and dashboard out. Once the game is restarted continue and check the stats screen, devices used should say 0.