In my experience Linux gamers aren't just Linux users and they're quite happy with tarball files and clicking on a executable. All self-contained and without getting all over the place with an installer. List requirements (if any), and it works.
Personally I don't like installing games as root, because the game developer doesn't have the level of trust that my Linux distributor has earned over the years.
Good effort anyway. It is true that Linux support is usually poor. If the game plays OK with WINE I usually don't bother trying the Linux version.