There’s a lot of solo work involved in roleplaying so not exactly (drawing maps, creating characters, settings, etc…), but for the act of pnp (all variant included) roleplaying itself, yeah, my experience is that I need at least one other person. 🙂
Note that I did try my luck at video games for a really long time (most of my life to be honest), but a few years a go, several of those video games just vanished because the company backing them decided so, and I ended up with squat. I Realized my old school dead tree rpg books from the eighties were still working just like the recent ones no matter the choices of their publisher, so there I am. 🙂