This is something we’re considering! We’re looking into creating notification channels for games – whether that’s in the feed or the notif stream or push notifications. (We’re also looking into revamping the feed!)
edit: Just to add onto this / provide more detail – the endgame is to have all sorts of notification channels for different types of notifications. It’s been a while since we released push notifications & the notification stream, and it’s mainly because it takes a lot of time to build these systems. For example, we only support one-to-one notifications now – e.g. someone sends you a friend request or someone sends you a PM. To broadcast activity to multiple users at the same time (i.e. what your post is describing) requires a lot more work especially regarding scalability. And after we build out the infrastructure, different teams need to schedule in time to build out the actual notification types.
Anyway, if anyone wants to chat about game notifications one on one, shoot me a PM – I’m happy to discuss what I’m thinking about!