Nintendo have applied and received a patent for a new system which would allow them to implicate a rating for video games using external metadata. This would theoretically be able to rate games using feedback received from gamers and has nothing relating to ratings boards such as the ESRB and PEGI.
The description reads as follows:
In certain example embodiments, a computer system for generating an implicit video game rating is provided. The system generates a base rating that is a function of gameplay data for a specific user and other users. The system also generates an average external rating for the video game based on external data categories such as, user reviews, critic reviews, ownership data, etc. An adjustment factor is then calculated from an average base rating and external rating and then applied to the user’s individual base rating to obtain an implicit rating of a video game for the user.