Guide to each of the rooms if you're struggling to solve a puzzle!
First Room, Attic
The first room has several important objects. If an object necessary to solve a puzzle is tossed too far away from the center of the play area, there's a chance it will re-spawn at its starting place.
First of all, you need to free yourself from the metal chain. Grab the hammer, hold your chained hand over the anvil on the floor, then gently swing the hammer over the broken iron link close to your left hand. The chain should break immediately if you're successful.
There are two metal objects suspended by hooks that look somewhat like locks. Over the wooden hatch on the floor, there is a metal hook. Place both of these metal objects onto the hook and the ceiling should collapse, granting access to the next area.
The Power / Electricity
When you reach the main floor of the house, there will be three doors. The door farthest to your left leads to the circuit breaker, so go there first.
Find a nail in the room (there are some behind the palette if you misplace the visible ones) and insert it into the top notch of the circuit breaker. All lights should now work. Grab and hold onto an extra nail for the next room.
The note in this room is under the bottom shelf.
In the bathroom immediately next door, the note is under the tank behind the toilet; simply remove the lid and you can read the note.
Back in the hallway, use a nail to lodge the key from the farthest right door. Grab the key from the hole under the door and use it to unlock the door and enter the foyer.
Inside the foyer, there is a radio on top of a nightstand. Open the shelf of the nightstand and there should be a doorknob. The doorknob can be attached to the door behind you to allow access to the kitchen.
// Unrelated, but if you want to do the special gesture to unlock an achievement, press and hold a trigger down then press the grip button on the same controller. Use it to show how much you love your friends
Kitchen / Basement
In the kitchen, the second cupboard up top has a pot. Fill it with water from the sink, then place the pot on the stove. Turn the leftmost knob until the water audibly begins to boil, then dump the water on the frozen door in the kitchen. You're almost done!
// Unrelated, but to get an additional achievement open the fridge in the kitchen and hold the pizza up to your face to eat it.
In the cellar, grab a bullet and place it into the keyhole of the iron gate. You need to actually crawl into the large pipe in the room to grab a hammer and see the last note in the game, so stay low to avoid clipping issues. Gently hit the bullet with the hammer to open the last door.
Congratulations! You deserve life. Well I mean you were desperate/resourceful enough to look at this guide, so I'll leave the conclusions up to you.