I’ve been working on this for a while, and I’m excited it’s finally ready to share.
Basically, this website is a fancy database of games that lets you search for games based on the reason you want to play the game, rather than the mechanics that game uses. For instance, Portal and Fez are games that have very different mechanics, but I bet that people play both for the same reasons–because they want to overcome interesting challenges and explore new areas or strategies (Challenge and Discovery). The categorization system is based on an Extra Credits video and an academic paper that you can read about more here.
If you want to help categorize games you’ve played, make an account and vote on their core aesthetics, so that we’ll all have a better idea why we might want to play them!