PlayStation 4 versions of Call of Duty: Ghosts purchased at retail will run in 720p until users download a day-one patch that improves the native resolution for single-player, an Activision representative told Eurogamer today.

The launch-day patch will make the game's single-player campaign output at native 1080p. Without it, the campaign would be upscaled to the higher resolution.The game's multiplayer will run in 1080p out of the box without the update.

An Activision representative told Eurogamer that a "configuration issue" is to blame.

"There was a configuration issue in the retail version on single-player mode only," the representative said. "This has been addressed with a day one software update. People will be able to download the day one update when PlayStation 4 launches in their territory and play at native 1080p."

Meanwhile, the Xbox One version of Call of Duty: Ghosts will run natively in 720p, upscaled to 1080p. Sony president of Worldwide Studios Shuhei Yoshida told GameSpot this week that developers aim for 1080p for practical reasons.

"I don't think any team is just fixated on 1080p, it's just one of the options...but [1080p] games allow you to be more precise and a better gamer," Yoshida said. "That's clearly the benefit."

Call of Duty: Ghosts was released for Xbox 360, PlayStation 3, PC, and Wii U last week. Activision sold more than $1 billion worth of the game to retailers in 24 hours. The shooter will be released for PS4 and Xbox One at launch.