Hi,
to get this achievement, you simply need to complete the first episode with both Claire and Barry.
This solution is supposed to serve as a summary for miscellaneous achievements, that can be earned in this chapter as well.
This solution will not cover various "kill x enemies with y" achievements. The only kill related achievement in this solution will be the "Fish in a Barrel" achievement
Videos will be provided for the following tasks:
1. A walkthrough of both chapters (video credit: NukemDukem)
2. A video concerned with all the collectibles (video credit: GamerForEternity)
3. A video for all the medals (video credit: PS4Trophies)
4. A video for the "Who Needs Fire" achievement (video credit: PowerPyx)
5. A video for the "Fish in a Barrel" achievement (video credit: PS4Trophies)
Here we go:
1. Walkthrough 2. Collectibles3. Medals (Claire & Barry) 4. Who needs Fire? : 5. Fish in a Barrel: Hope this helps!
Any improvements? Please let me know in the comments below!