Hiving Gaming is the main community.

All the major Hive games have their own Discords/communities.

You can find most of the major Hive web3’s here. https://hive.io/eco?t=game

There is also a more extensive list on https://hiveprojects.io/categories/games/. Some many be abandoned.

There are also just a lot of random gaming communities. You can find most of them by searching for “game” in the community section on PeakD or most Hive frontends that support the community feature. https://peakd.com/communities. There everything from game screenshots to DND communitie.