Does the Launcher have arguments yet?
If not, could we get a few to launch games through shortcuts?
The implementation should be relatively minimal, you could pass-through a -game t6sp argument to the launcher in appdata, and then the launcher would do it's normal thing:
Login -> Display Menu (if -game argument, click play on that game) -> Launch Bootstrapper
Or it could be even more minimal and only be added to the launcher in the appdata, so people don't need to redownload the updater, since this is more of a niche request anyway.