In Revel there are now three mechanics for notification:

Notify: which is a non-modal single line, 'blinking' notification that shows at the top left.

Alert: a modal message with an OK button.


and the new mechanism is called 'deepen'; it is meant to be used when a singular story critical event happens.

Currently it is only used for acquiring new, and completing quests, but eventually might be used for other potentially powerful story related happenings.