I’m younger and don’t have a serious injury, so I wouldn’t say this would fix back pain for someone with an actual injury.
But for me, back pain was fixed with better posture and muscle strengthening too.
I think the biggest thing was focusing on engaging the muscles supporting the lower back. Glutes and core specifically.
And for posture, just be conscious about keeping the body in alignment in a way that feels comfortable, not “sitting up straight”
In rough chronological order:
Starflyers
Mario Kart
Shadow cities
COD zombies (ios app version)
Minecraft
I’m stopping this list before high school, as I built my first PC and figured out emulation, so I started playing a lot more games.