Debian Stable is an excellent operating system, but rarely backports new Nvidia driver updates, which you might want for new driver features etc. for gaming. Nvidia provides a repository for its CUDA computing platform for Debian that includes up-to-date driver packages, and installs cleanly as an upgrade to the Debian-provided packages. Note that you might get "beta" drivers.
For Debian 12 (bookworm) use the following to enable the repository and upgrade:
wget https://developer.download.nvidia.com/compute/cuda/repos/debian12/x86_64/cuda-keyring_1.1-1_all.deb sudo dpkg -i ./cuda-keyring_1.1-1_all.deb sudo apt update && sudo apt upgrade