UPDATE: The offending bug has indeed been removed - and a day before expected. We've since verified that it no longer exists, and will aim to have our final review with you early next week.
ORIGINAL STORY: Watch Dogs: Legion, the third in Ubisoft's urban open world series, has a game-breaking bug at launch on Xbox One X that can make progress in its campaign impossible. Ubisoft is working to remedy the matter in a hotfix due at the end of this week.
The issue appears to be triggered around 6-8 hours into the main campaign (during a mission called - I kid you not - 404). Our reviewer reported the game freezes at a certain point and the Xbox console warns it is about to shut down, as it's designed to, because of overheating - which it duly does. It's an issue we've anecdotally heard has happened to multiple reviewers of the game on Xbox One X - Ubisoft's recommended platform for reviewers.
Other platforms appear unaffected by the specific issue, though members of the Eurogamer team have reported more minor bugs with the PS4 Pro build.
Ubisoft is currently working to rectify the matter. "We're aware of this issue and there will be a hot fix due to be released on 30th October which should help," the company said in an official statement.
The review embargo for Watch Dogs: Legion has also just lifted, but given the issues we've had - and the imminence of a fix - we'll be holding off posting until we've been able to experience more of the game, and when we can verify that the forthcoming hotfix works. We're aiming to get it to you early next week - but in the meantime, if you're looking to pick this up on Xbox One X, it's best to exercise some caution.