Ubisoft could potentially launch somewhere between the middle of September to the middle of October after being denied certification by PlayStation and Xbox.
In a written update, producer Mark Rubin said that Ubisoft started the certification process for XDefiant on PlayStation and Xbox at the end of July. However, in mid-August, Ubisoft found out that the game received a Not Pass. If it had passed, then XDefiant would have been released at the end of August.
Now, Ubisoft has to search for compliances and functionality bugs within the game and fix them so that it can ship. Ubisoft plans to submit to first party platforms for certification again in less than two weeks. If the game passes, then it can officially be released by middle to late September.
Or neither. Platform cert doesn’t directly correlate to how many bugs a game has, it’s a set of very specific test cases that software has to pass to be approved for release: show the correct button prompts for the platform, have correctly-implemented achievements/trophies, show correct error messages, etc.
Some of the tests do include things like ‘don’t crash during normal operation’, but the failures could be almost anything. (Source: am a developer)