Unfortunately, the only true gaming OS is Windows. I don't game much, but I do have a small windows box just for that one old game that I occasionally play - Urban Terror. (Ryzen 5 5600X / 32GB DDR4-3200 / RX 6600 XT / 1TB NVMe / Seasonic 750W - small but tough :))
I also have a Pixel 7a that...