Warframe has done away with it's alerts and adopted a new battle pass system called "Nightwave". The first season, or "Act" is called "Wolf of Saturn Six". There are some amazing items (both cosmetic and non-cosmetic) that one can earn through dailies, weeklies and elite weeklies. Thankfully, DE has gone on record to state that you can reach max level by completing a little more than half of the activities (60-65%). I'm glad Warframe consistently revisits old systems and attempts to ensure they are up to date and relevant.
I'm a Warframe Partner and you can find me streaming Warframe occasionally at twitch.tv/bwana