Rework Genres and Themes
Right now there seems to be some confusion with the available options for Genres and Themes. Some options are missing, others are in Themes whereas they would make more sense in Genres, and yet others are way too broad to be descriptive and informative.
My suggestion is first to determine what is a Genre and what is a Theme, and convey that to all the data contributors. I suggest to define "Genre" as something that indicates HOW the game is played (gameplay rules and elements), and "Theme" as something that indicates WHERE the game is played (setting and lore elements).
Then, with that in the mind, the current available options for Genres and Themes need to be reworked. Here is a link to the table that lists proposed changes to be made to Genres and Themes, with comments and explanations:
https://docs.google.com/spreadsheets/d/1KahdN-p1zqaQRCK1W9kwar3IbTBsCVFXbS4rHeiC8yg/edit?usp=sharing
I think the new values would be more universal, better inform IGDB users about the games' contents, and allow more efficient filtering by Genre/Theme.

Hey!
First of all thanks a lot for putting this table together, this for sure will become handy when we research this further.
We’ve been wanting to revamp our Genres/Themes/Keywords for a while, it’s a fairly big undertaking that implies a taxonomy upgrade.
We’ve discussed making use of a sub categories to avoid redundancy and more accuracy for example.
While this isn’t on our radar just yet, i would say it is pretty high up our list of feature upgrade. We’ll keep in touch when we start this project!