Big fan of telegram and slack to be honest however for gaming discord is the way for a gaming "community":
https://discord.gg/4uc6MFh
I've created a pa server there. All are welcome if we want to try and create something more neutral and give this a go. Note: Discord is a lot like IRC from my perspective however the Apps make it way more approachable and the missing features we see the messaging apps (TG, WA, Slack) in comparison to IRC are all available.
- @mentions
- Push notifications
- Uploads
- Voice support
- etc
Also anyone wanting to admin etc let me know I have no fudging clue.