Found a similar API that is more updated and can fetch said lists. Will be using cross-referencing from it.

https://www.giantbomb.com/api/

Not sure if I'm posting is the right place, but I would like to know if there is a full list of themes, genres, platforms, and publishers that the API will accept. If there is one, if someone can kindly point me to the correct place, that would be great.

I would also like to know if there is a way to filter games using multiple values for the same field (ie. action and adventure for genres). I've tried 'genres:action,adventure' and 'genres:action&adventure', but that would return games with only the 'action' genre.

Thanks in advance.