Marvel's Wolverine Milestone 13

Insomniac never published or endorsed any Milestone build. The authoritative version of this game is the retail release from September 15, 2026.

In December 2023 the Rhysida ransomware group breached Insomniac Games and exfiltrated roughly 1.6 TB of data — about 1.3 million files. The group auctioned the data with a starting bid reported at 50 bitcoin, then published it.

The dump included multiple Wolverine milestone builds — Milestone 8 and Milestone 13 among them — plus concept art, casting documents and release planning material.

Wikipedia's entry records that development was affected by the attack, and that Insomniac's public response called the incident "extremely distressing," emphasising that the game was still in early development at the time.

Twisted Voxel's December 20, 2023 report catalogued roughly 25 minutes of playable content. Its contents were tutorial-shaped rather than a slice of a real campaign:

• Combat tutorial — basic claw combos and stealth mechanics
• Title screen — an early UI pass
• Traversal tutorial — parkour-style movement instruction
• Sense-tracking — following glowing golden hoofprints on the ground to a target
• Hunting tutorial — tracking and hunting a caribou
• Three mission templates — Shipyard, Construction and NYPD prototype environments
• Opening sequence — a cutscene into a cabin section where Logan interacts with claw marks, a fire, a mallet, a radio, papers and a cooler, then heads outside with a character named Walter

TheGamer characterised the leaked build accurately: it is a collection of tutorials and a vertical slice, assembled to demonstrate core mechanics and creative direction. That is what milestone builds are for internally.

It is explicitly a work in progress and does not represent finished quality, pacing or content. Judging the retail game by it is a category error — the build was never meant to be played by anyone outside the studio and its partners.

M13 also shipped alongside substantial character documentation: character bios, early models and animation work, which is why so much casting and story speculation came out of this leak.

The clearest difference is geography. Story documents in the leak listed planned locations as Alaska, Avalon, Canada, Japan and Madripoor. The official PlayStation page lists the shipped game's locations as Canada, Japan and Madripoor.

Alaska and Avalon do not appear in any official material for the finished game. Whether they were cut, folded into other regions, or renamed is not something any source establishes.

Beyond geography, the M13 prototype missions (Shipyard, Construction, NYPD) were template environments rather than shipped levels, and the tutorial structure bears no resemblance to the retail opening.

The phrasing of this search suggests people expect a level guide, and it is worth explaining why one cannot exist.

M13 has no campaign to walk through. It contains tutorials — combat, traversal, tracking, hunting — plus three prototype mission environments and an opening cabin sequence. There is roughly 25 minutes of content, and it does not connect into a playable story.

The mission templates (Shipyard, Construction, NYPD) were environments for testing systems, not designed levels with objectives and solutions. There are no puzzles to solve or bosses to route.

What people usually want from this search is either curiosity about the leak or information about the finished game. The second is far better served by our playthrough page, which covers the retail game's actual structure.

Treated as a historical document rather than a game, the build is genuinely informative about how the project evolved.

Several core ideas survived to retail. Claw combat, optional stealth and sense-based tracking are all present in M13 and all present in the finished game — the golden hoofprint tracking in the hunting tutorial is recognisably the ancestor of Logan's sense mechanic.

Other things changed substantially. The parkour-style traversal emphasis reads very differently in a linear game than it would have in whatever structure was planned in 2023, and two planned locations — Alaska and Avalon — do not appear in the shipped game.

The presence of a character named Walter in the opening cabin sequence is the kind of detail that generated speculation, and it is exactly the kind of detail that early builds routinely discard.

None of this predicts the retail experience. Prototypes exist to test ideas, and most tested ideas do not ship.

M13 was not only a playable build. It shipped alongside substantial design documentation, and that material generated more discussion than the build itself.

Reporting describes character bios, early character models and animation work included in the leak. That documentation is where much of the pre-release character speculation originated, well before official announcements.

It also contained the planned location list — Alaska, Avalon, Canada, Japan and Madripoor — which is now the clearest documented difference between the plan and the shipped game.

The wider Rhysida dump went further still, including casting documents and release planning for multiple Insomniac projects. This is why the breach was so damaging: it exposed not just one game's build but years of internal planning.

None of it is a reliable guide to the finished product. Design documents describe intentions at a point in time, and this one is dated 2023.

Three reasons, in order of practical weight:

• Legal exposure. ISPs have sent DMCA notices to downloaders requiring deletion, with account termination as the stated escalation.
• Security. Cracked builds distributed through unofficial mirrors are a well-known malware vector, and there is no trustworthy source by definition.
• It is not the game. Twenty-five minutes of 2023 tutorials tells you nothing useful about a 2026 release that shipped with different locations, systems and scope.

If you want to know what the finished game plays like, our gameplay systems page covers the retail mechanics, and leaked gameplay covers the broader leak story.