True
Assassin's Creed Black Flag Resynced, released on July 9, stands as the first remake in the history of the Assassin's Creed franchise. The "first-ever" designation is derived from the series' release record rather than an explicit declaration by Ubisoft.
Black Flag Resynced belongs to Ubisoft's Resynced line, which rebuilds an earlier title rather than simply upgrading its visuals. Among the many entries released across the Assassin's Creed franchise to date, no prior title has been designated a remake, making the July 9 launch the first of its kind for the series.
The distinction rests on the historical record of the franchise's releases rather than on an official statement from Ubisoft declaring Black Flag Resynced as the series' first remake. No prior Assassin's Creed entry in the company's release history has been categorized as a remake.
Based on the franchise's release record, the claim that Black Flag Resynced is the series' first-ever remake is True.