Call of Duty: Ghosts is the most-played online multiplayer game on Xbox One globally.
So reported Activision in an announcement on Tuesday, citing Microsoft as the source of its metrics. The firm also claimed the title is the "most played PS4 game" in North America, again citing platform holder Sony.
Activision recently said that Call of Duty: Ghosts was the best-selling PS4 game "in retail sales" according specifically to sales at retail chains Best Buy, GameStop, Target and Walmart.
The new announcement on Tuesday made identical claims regarding the Xbox One version at those same specific retailers.
Once again, the firm held off releasing specific sales figures for the title.
"Around the globe, Call of Duty: Ghosts is leading the next generation. It's the #1 selling title at key retailers and it's also the most played game on Xbox One and PS4 globally," said Activision CEO Eric Hirshberg.
"As we've said before, we've got the best community of fans in the world, and we're thrilled they're coming with us to the next generation."
The company said earlier this month that retailers spent over $1 billion worldwide to secure Call of Duty: Ghosts stock for launch day. While Activision Blizzard CEO Bobby Kotick said it was "too early to assess" sell-through to consumers, he suggested the game's release came at a time "when the franchise has never been more popular".