Since guides are blocked for some reason I'll just post this here. These are some tips for you to beat the office.

Spoilers, duh

Try to always have a fuse in hand.
Order of priorities:

1. If you hear the main going out DROP EVERYTHING THAT YOU'RE DOING and recharge it asap.
   
2. Check the cameras for Foxy, get rid of him if he's there.
   
3. If Chica's coming out, find all cupcakes to get rid of her.
   
4. Recharge cameras if low unless recently dealt with Foxy.
   
5. Recharge flashlight if low unless recently dealt with Chica.
   
6. Get a fuse in your hand.
   
7. Locate a second fuse for later use.
   
8. Find Freddy in the cameras and flash him.

When the night first starts there's not much going on, only Freddy appears on the cameras until you recharge the main for the first time (more on this later).
You can use this time to get comfortable with the controls if you haven't already:

• Use A and D when in the cameras to switch between them without having to leave.
  
• Use right click or space to "leave" your current action (space doesn't require you to move your mouse)
  
• Grabbing a fuse sometimes is a bit finnicky: you should aim for the middle.

Use this time to locate two fuses, grab one and remember where the other one is for later. You should always do this if you have the time.

Keeping the main charged is your top priority. However, don't overdo it: the night doesn't get harder as the clock goes by/you flash freddy, but rather the night gets harder each time you recharge the main so you should only do it when it's low. Also the office and cameras start to visibly deteriorate as you do this.

You'll know when the main is about to go out when you start hearing an increasing-in-pitch dreadful ambiance (not to be confused with Chica about to spawn), that's when you should stop what you're currently doing (unless it's getting a fuse!) and go to the electric panel and recharge it.

If the main goes completely out you won't be able to interact with anything (even if you've got the electric panel opened with a fuse in hand), and eventually Freddy (?) will come up to you and kill you.

Foxy and Chica are the only two animatronics that can kill you and end your game (besides running out of power), so you should focus on them. Foxy is the most active of the two, and gives you less time, so you should deal with him before Chica.

Foxy only starts spawning after the 1st/2nd main recharge, and he takes longer to get rid of the more times you recharge the main.

If the main is not about to go out, you should check the three cameras to look for him before doing anything else (that includes Chica). Luckily, he's always right in the middle of them and he's very flashy, so you don't need to look around for him. If you don't see him right away, move to the next camera.

If you do see him, you need to aim the camera at his eyes, he'll start shaking, make a sound, and teleport someplace else in the same camera. This draws some camera power. You need to repeat this enough times (the amount of which go up with each main recharge), until he makes a distinct sound and poofs away.

If you fail to do this for enough time, he'll get inside the office and kill you.

Chica only starts spawning after the 3rd (?) main recharge, and she'll make her presence well known.

Once she appears on the roof, she'll start wriggling down towards you, and you need to find her cupcakes and flash them in every single drawer/cabinet to make her go away, the amount of which increase as you recharge the main.

Before you start going on a cupcake hunt, check for Foxy so he doesn't surprise you as you're doing it.

While you're looking for cupcakes, you can also look for fuses if you haven't located them already.

Flashing her cupcakes take less flashlight battery than flashing Freddy, but if you manage to run out, go recharge it quickly.

If you fail to do this, Chica will fully come out and kill you. She can also kill you if you run into her while she's wriggling out, so be careful.

Aside from the main, there are two other things you need fuses for: the flashlight and the cameras, and you need to keep them recharged to deal with Foxy, Chica, or Freddy. If you've got nothing else going on (no Foxy or Chica), you should do this.

As Foxy is the main danger, you should do the cameras first, if one of them gets too low (1 bar) you should use a fuse and recharge it. You need to make sure you have enough charge to deal with Foxy one time as you can run out of power in the middle of flashing him, and that can leave you open to him getting inside. The camera quality also deteriorates as it's power goes down.

Unlike the cameras, the flashlight is fully operational until it completely runs out of power, so you don't need to recharge it until it's fully out (unless it's low and you're anticipating a Chica attack).

In my experience, there can only be 2 fuses in the office at the same time (including the one you have on your hand), unless the night just started in which case there are 3. Once you use one on the electric panel, another one spawns on a random drawer/cabinet.

If you've done all of the above, you can use this time to look for fuses. You should always have a fuse on hand for emergencies (main/camera out when foxy/flashlight out when chica) and, if you can, know the location of the second one.

While flashing Freddy is the only way to progress the night, he's also the lowest threat, as he can't kill you. Only look for Freddy once you've done all of the above.

In order to beat the night, you need to flash him 12 times, to do this you need to look for him on the cameras, he's either on the left or right side. Be careful not to look at Bonnie while you're doing this!

If you see him, remember where's he's at:

• CAM 1 is the closet to your left.
  
• CAM 2 is the hallway in front of you.
  
• CAM 3 is the window to your right.

You also need to remember which side he's on, if you aim your flashlight at the wrong side he'll run away. CAM 1 and 2 are simple, flash the side that you see him on on the camera. However CAM 3 is flipped (as it's aiming towards the window you come out of), if you see him on the left flash the right side and viceversa.

If you don't do this for enough time he'll leave that spot and later spawn somewhere else.

Just like Freddy, Bonnie can't kill you, however he's still an issue: if you look at his face (or lack thereof) on the cameras, he'll punch it and completely dry it's power. Also if you go to where he is and flash him (which you shouldn't be doing anyways without checking first), he'll instead punch you and completely dry out your flash light, as well as stunning you for a few seconds.

Luckily it's easy to avoid him as you can look at any other part of him without looking at his face: what i do while looking for Freddy is aim down when opening a camera and checking the sides, with enough practice you'll learn to differentiate between the two, Bonnie has way more metal exposed.

Keep in mind that Bonnie and Freddy can be in the same camera at the same time, but on different sides. Flash carefully!

Most of these are pretty straightforward but I'll list them anyway:

• PLANNED OBSOLESCENCE: Try to use the flashlight while it has no power.
  
• SPATIAL DISORIENTATION: When looking where Freddy is, flash the opposite side he's on.
  
• LIGHTS OUT: Have the main completely run out and get killed.
  
• OUT LIKE A LIGHT: Find Bonnie on the cameras (without him punching it), go to where he is and flash him.
  
• THE PATH: Beat the night!
  
• ONE MORE?: Die 10 times, you'll probably do this anyway :)
  
• FUTILE: Inmediately upon getting jumpscared, tap ESC and quit the game.
  
• MAINTENANCE EXPERT: Swap 100 fuses in ONE GAME (without dying).

That's it! Hope this helped you.