For years, PlayStation had a trophy that Xbox didn't know how to copy without looking like a copycat: the Platinum. You complete the base list, and the system hands you a status symbol. Microsoft, through Xbox CEO Asha Sharma, had previously teased that an equivalent would arrive "later in the year." By late September 2026, that equivalent finally has a name in the software: Mythic Achievement. There isn't an official keynote with green confetti just yet, but evidence in the Xbox PC app, Insider builds, and reports from The Verge, Windows Central, Neowin, and technical analysis by XCT.live all point in the same direction. Mythic unlocks upon completing the BaseGame achievement group—the original game's list—, adds no Gamerscore, is framed as retroactive, and, in the current reading of the code, leaves out packages tagged as Add-on/DLC.
The Verge (Tom Warren, Sept. 23, 2026) describes what can already be seen in the Xbox PC app: Mythic appears upon completing all of a game's Achievements, featuring its own unlock sound, dashboard tracking, and a Mythic counter on player profiles. Days earlier, Stallion83, via Pure Xbox, spotted Completed/Incomplete Mythic Achievement filters in console Alpha Skip-Ahead builds. Windows Central and Neowin framed the discovery as the long-awaited answer to the Platinum. XCT.live went further: it decoded app version 2610.1000.53.0 and documented achievement groups, the BaseGame type, the "Mythic achievement unlocked" toast, the flipbook animation, the MythicAchievementUnlocked.mp3 audio file, and the EnableAchievementGroups flag, which as of September 23–26 remained toggled off in the public flags service. Plainly put: the client already knows how to celebrate; the server just hasn't started the party yet.
The rules that matter to hunters are clear in the current evidence. Mythic counts achievements from the BaseGame group, not the Gamerscore percentage Xbox currently displays. This avoids the classic "100% Gamerscore with achievements still locked" issue when a title receives lopsided expansions. DLC and add-ons appear outside the group; the toast notification explicitly mentions unlocking all achievements "in the original game." Reports from sources close to the feature, gathered by XCT, add that Mythic is worth 0 Gamerscore, is retroactive (upon activation, profiles would receive Mythics for games whose base lists are already completed), will display a total Mythic count on profiles, and that artwork for a "mythified" game gains a green star, laurels, and a custom border. There is also word of a per-title tracker and Mythic filters across achievement views—consistent with what Insiders already saw on console and the "Required for Mythic achievement" filter in the app.
There are still nuances Microsoft hasn't officially signed off on in a blog post. Will all Xbox 360 and Xbox One games be included, or only the modern catalog? The app's code does not limit by generation; the server decides what goes into BaseGame. Do unobtainable achievements or hard-delisted titles block a Mythic? Unknown. Will there be Rewards points? No reward field appears in XCT's analysis. A global rollout or Insider-first? That isn't settled either; the prudent reading is "soon," possibly before the end of September according to some sources, but as of September 26, the flag remained off and groupIds were empty in API checks. For games journalism, that means: a real client-side feature, not an empty marketing announcement, but still in the engine room.
The cultural timing is impossible to ignore. Mythic began surfacing in the app the very same day Microsoft announced heavy Xbox cutbacks—hundreds of jobs, IP moves toward Activision, and lingering questions over studios like Ninja Theory—according to The Verge's own account. Unlocking achievements doesn't fix an organizational chart, but it does fill a status void that the completionist community has spent years asking for on forums and TrueAchievements. PlayStation turned the Platinum into common gaming vernacular ("I platted it"); Xbox had Gamerscore, rarity, and ratios, but lacked that single symbol for closing out a base list. Mythic targets that gap with its own aesthetic—aurora, laurels, and a distinct sound different from standard and rare achievements—instead of simply slapping on a generic silver crown.
For players, the practical takeaway today is simple. If you've already 100% completed base lists, get ready for your Mythic counter to populate on its own once Microsoft flips the flag and pushes server data. If you're halfway through a DLC-heavy title, keep an eye out for the "Required for Mythic" filter when it appears: you don't need to buy expansions for the Mythic based on current evidence. If you live on Insider rings, check your Completed/Incomplete Mythic filters. And if you're a PlayStation player who crossed over to Game Pass, brace yourself for a whole new profile-measuring contest: Platinums versus Mythics, with different rules and the exact same ego.
In summary: the Xbox Mythic Achievement is the emerging equivalent to PlayStation's Platinum—base list, 0 Gamerscore, reportedly retroactive, with UI and audio already present client-side. Microsoft has yet to officially roll it out to the general public; the groundwork is laid across apps, Insider rings, and responsible community reverse engineering. Once the flag is switched on, completionist feeds will sound with green fanfare. Until then, the journalistic takeaway is this: Xbox's Platinum already has a name, rules, and animation; all that's missing is for the server to say "go."
Sources: The Verge / Tom Warren (Sept. 23, 2026); Windows Central; Neowin; XCT.live Mythic Achievement wiki (analysis of Xbox PC app 2610.1000.53.0 and Game Bar 7.326); Pure Xbox / Stallion83 (Insider filters); previous statements by Asha Sharma reported by Pure Xbox.