If you're after the Deja Vu achievement or have simply given up on solving the puzzles, this is the guide for you.

Hang on, didn't I already say that?

Anyway this is actually just a speedrun, but most walkthroughs I've seen are really slow, so I decided I would upload it here as a guide to save people some time.

This guide will give you most of the achievements, aside from the following:

Go to your room!
Stargazer
Pet cemetary
Lost in limbo

There's already a handy achievement guide by neonmood, and you can even get them in the same run if you like.

https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=2168620554

Make a new steam account, play The Almost Gone through family sharing and repeat steps 1 & 2.