In 2020 peak concurrent users on Steam was 20 million and total was 120 million. In 2025 there are currently 69 million concurrent users with a total of 132 million.
@Kiryu, those figures are above AC: Origins' max Steam player count (#3), though behind AC: Odyssey (#1). There's also no data for the Ubisoft app, where you can buy it or play it as part of the Ubisoft+ subscription service (something you couldn't do when Origins/Odyssey released). We'll need to see what the console situation is and how Ubisoft frame it at their next quarterly report.