Buying Assassin’s Creed Black Flag Resynced on Steam does not free you from Ubisoft’s own launcher. The PC version pulls in Ubisoft Connect no matter where you bought it, which is the same setup every Ubisoft-published game has used for years. Your Steam purchase still has to check in with Ubisoft’s servers before it will run.
Quick answer: Yes. On PC you need a Ubisoft account and the Ubisoft Connect application installed to play, even through Steam. Launch the game online once to authenticate the license and link your account, and after that it will start in offline mode.
What the PC version actually requires
The Standard Edition on the Ubisoft Store spells out the PC condition directly. You need a Ubisoft account and the Ubisoft Connect app to play, and the game is automatically added to your Ubisoft Connect library for download. That requirement carries over to the Steam and Epic Games Store versions too.
In practice, this means a Steam copy launches Ubisoft Connect in the background before the game starts. You sign in with your Ubisoft account, the license is verified, and only then does Black Flag Resynced load. There is no way to skip the Ubisoft layer on PC.
Denuvo and the stacked DRM on Steam
Ubisoft Connect is not the only protection layer here. Like Valhalla, Mirage, and Shadows, Black Flag Resynced ships with Denuvo on Steam, the Ubisoft Store, and the Epic Games Store. Denuvo caps you at running the game on no more than five different PCs at once.
If you buy on Steam or Epic, that stacks up. You end up passing through three separate systems to launch the game, the store client, Ubisoft Connect, and Denuvo. Buying directly on Ubisoft Connect removes the store-client layer if you would rather deal with fewer of them.
| Where you buy it | Layers you go through to launch |
|---|---|
| Steam | Steam client, Ubisoft Connect, Denuvo |
| Epic Games Store | Epic launcher, Ubisoft Connect, Denuvo |
| Ubisoft Store | Ubisoft Connect, Denuvo |
The extra clients are an annoyance, but based on how the recent Assassin’s Creed games behave, Ubisoft Connect does not meaningfully change performance and stays light on memory.
Playing offline after the first launch
The whole campaign is playable offline once the setup is done. You only need to connect online a single time to install and authenticate. After that, the game runs without an active connection.
You know it worked when the game loads and plays with no connection active. The catch is only that initial online launch. Skip the authentication step and the game will not start offline.
What the Ubisoft account gets you
The mandatory account is not purely a hurdle. A single Ubisoft account keeps your achievements, profile data, and save games tied together, which means cross-platform saves between the versions you own.
For Assassin’s Creed specifically, it also opens up Projects, the cross-game rewards that unlock across multiple titles without platform restrictions. Black Flag Resynced ties into this through Assassin’s Creed Shadows, where a new end-game quest called The Black Tides bridges the two games and two Animus Hub Projects hand out pirate-themed rewards for Naoe and Yasuke plus Japan-inspired outfits for Edward once Resynced launches.
Consoles and Steam Deck
The offline pattern extends beyond PC. On PS5 and Xbox Series X|S, you can play offline after you have linked the game to your Ubisoft account. The account linking is the one online step that unlocks everything else.
Black Flag Resynced is also Steam Deck verified from launch, so it runs on Valve’s handheld without major issues. It arrives July 9, 2026 on PS5, Xbox Series X|S, and PC through Steam, the Epic Games Store, and the Ubisoft Store. Whichever route you pick on PC, Ubisoft Connect comes with it.
