I have a bad habit of losing track of passwords. What usually works best for me is taking a picture of the screen with my phone and then when I want to go back to that game I will go through my gallery and look for the newest photo of that particular game.

I used to keep track of them in a notebook and then just cross out the old password once I wrote the newest one down but I tend to lose notebooks. The phone rarely gets lost since it is essentially another component of my body at this point, sadly.