Ubisoft's remaster of Assassin's Creed IV: Black Flag, known as Black Flag Resynced, could not simply reuse the codebase of the original 2013 release, meaning developers effectively had to rebuild large parts of the game from scratch. The disclosure, made by developers speaking to GamesRadar+, highlights the scale of technical work involved in bringing a decade-old open-world title up to modern standards, rather than the more straightforward remastering process fans might expect.

Black Flag, the pirate-themed instalment in the Assassin's Creed series, remains one of the franchise's most fondly remembered entries thanks to its naval combat and open-world sailing. According to the developers, the inability to carry over the original code meant significant portions of the game had to be reconstructed for the new version, underlining how outdated or incompatible the source material had become for current hardware and tools. Further specifics on the reasons behind this, along with release details for Resynced, were not fully available from the article.