A screenshot of the Xbox Games Store, spotted on Reddit, shows an Xbox One closed beta download weighing in at 23GB.
Watch Dogs has a variety of multiplayer modes, including a recently unveiled free-roam mode.
"You are Aiden Pearce, a brilliant hacker but also a former thug, who's [sic] criminal past lead to a violent family tragedy," reads the game listing. The text is very similar to descriptions for Watch Dogs previously written by Ubisoft.
"In a world led by technology, you will be able to hack and manipulate the city's systems to stop traffic lights, detonate gas lines, turn off the electrical grid and more. The city of Chicago has become the ultimate weapon for a man bent on revenge."
Ubisoft declined to comment to GameSpot about a Watch Dogs beta.