Disabling sound of notification for certain apps

But, not disabling the notifications entirely. On Android, obviously.

I am trying to find a way to mute certain notifications (games mostly) but still have the notifications show in the notification shade.

I know I can disable an app's notifications entirely, and there are plenty of apps that disable all notifications for certain times/criteria, but I haven't found anything that would only disable the sound (or let me customize it to a custom file/ringtone) for specific apps only.

Could Tasker maybe do this?