BoardGameGeek
A large tabletop community and database with mechanics, categories, ratings, rules, forums, designers, editions, and an XML API.
Why use it
Use BoardGameGeek to study portable tabletop mechanics, rules explanations, and player feedback outside video-game charts.
Where it fits
Study the market and the players you want to reach, then turn a loose idea into something you can test.
What to check
Community ratings carry audience and popularity bias; user-uploaded images, rules, and API data retain separate usage terms and are not automatically redistributable.