IT News on September 30th: Tech media NeoWin published a blog post today (September 30th) reporting that Microsoft has invited members of the Xbox Insider project to test "Mythic Achievements" (Mythic Achievement), with the first supported game being "War Machines: Incident Day".
This system is used to identify players who have unlocked all basic achievements in a particular game, similar to the Platinum Gold Cup on the PlayStation platform ( Platinum Trophy ). Below are some relevant screenshots from the IT community:

In terms of statistical criteria, "mythical achievements" are only included in the achievement list of the game publisher. Achievements that are subsequently added through DLC (downloadable content) or version updates are clearly marked as "add-on" and are not included in the "mythical achievements" statistics.

Microsoft has confirmed that "Mythic Achievements" support the retroactive (retroactive awarding) mechanism. If players have achieved all the basic achievements in previous games, including those from the Xbox 360 era, the status of their "Mythic Achievements" for those games will be automatically displayed when they visit their profile next time.
In terms of display status, to enhance the presentation of achievements, Microsoft has added a new " Gaming " (Games) tab to the Xbox profile. This page consolidates the achieved accomplishments and Gamerscore (player score) milestones, and adds a special border identifier to games that have mythic achievements.











