I've named the file plex_games_scanner.py, and this is all that's shown in any dropdown or interface that lists custom scanners.
For the metadata agent, I seem to be able to set the name via "name = 'something'" in the agent class, and it will use that. Is there something similar for scanner plugins? I've checked through those that I can find on github, but either no one there knows or hasn't bothered to try.