Like, games that you have played through multiple times, but you still like to replay them from time to time because you can just relax and have a good time without too much hassle.
For me some are Dark Souls 1&2 and Borderlands 1, I can play them without too much thoughts about what I’m doing, but still be focused enough so no bad thoughts appear.
I think for me it’s usually an old 3d platformer or something, rayman 2 & 3, but i also like the ps2/3 ratchet & clank games. I replayed those a ton as a kid, and as an adult i still like to boot them up every now and then.