A step-by-step guide to set up PC gaming on Ubuntu 24.04 / 26.04 LTS, plus a small
helper script (proton-run) to launch any Windows .exe through Steam's Proton —
straight from the terminal, no Steam library needed — and a GUI option (Lutris).
Tested on Ubuntu 26.04 LTS (Wayland/GNOME) with a hybrid Intel + NVIDIA laptop (GTX 1660 Ti). Works on AMD/Intel-only machines too — just skip the NVIDIA-specific bits.