Firewatch
10 Achievements
4-5h
Shutter Bug
Filled a disposable camera with photos.
8.8%
How to unlock the Shutter Bug achievement in Firewatch - Definitive Guide
*Update - Turned my X Box Back on hours later and it was unlocked. Must have been some kind of delay.
After you've found the camera in the backpack (see other guides), quit to the main menu and select Load Game. To the right of each saved game you have the option to copy the save to an empty slot. Copy your main save, and load the copy. Empty the camera, quit again, and load up your main save, and voila - you've gotten the achievement right away, and you still have film for story events later in the game.
As soon as you get the camera (missable - has to be picked up during day 2, in a backback hanging on a tree) press C to use it and just snap as many pictures as you can of anything you want and the achievement should pop.
This trophy can be obtained as early as Day 2. After the conversation with Delilah, both Henry and Delilah will conclude that it was the teen girls' doing of cutting the utility pole wire. Your next objective is to find the teens, the best route you can take is continue following the North trail until you're able to turn around and then head Southwest until you reach Cache Box 241. Along the way, you can find an abandon Hiker Backpack hanging from a tree. Press to swipe at the hanging backpack and then search it for a Disposable Camera and more rope. With the Disposable Camera you can press on the D-pad and then press to take pictures. Using all 18 shots will unlock the trophy. You can take pictures of anything in this game so you can save your final photo of the trophy's unlocking for something else if you wish to.
Below is a photo of where Cache Box 241 is located at:
During Day 2, you will come across a disposable camera as part of the storyline. When you get it, press to bring up the viewfinder. The trophy requires you to fill the disposable camera by using up all of the remaining shots, indicated by the number in the bottom right of the viewfinder. You can do so at any time by simply spamming until the number hits zero. It's worth bearing in mind that some unique dialogue occurs later in the game if you are still able to take photos, but it's not particularly relevant. Just make sure you use up all of the remaining reel before you complete Day 79 and the trophy will be yours.
This can be completed as early as Day 2. After finding the downed line and heading down the path (headed toward cache 241), you will see a backpack hanging on a tree. Knock it down and grab the items in it. One of the items is a disposable camera. Use up the remaining pictures to unlock the achievement.