Multiple ones.
I have an open pack of 5x7 file cards - I use them (folded in half) for making to-do lists, shopping lists and the like. I have a shelf that collects unwanted printer paper - misprints, test pages and the like - for doodling, and I have a stack of legal pads and graph paper pads for stuff I want to hang onto (the graph paper pad in particular is for notes and such about video games, and I’ve been doing that since the days of having to draw my own dungeon maps).
Oh yeah - Myst required lots of notes, because there were things that you’d learn at one point that were clues to some puzzle somewhere else. And yeah - just in general you needed to keep notes, because the games didn’t record hardly anything.
And none of the early RPGs generated maps - if you wanted a map, you had to draw it yourself.
I still make video game notes but they’re mostly just reminders - things like “500 wood for Robin” or “need Nordic helmet for mannequin at Heljarchen.”