[UPDATE] Following the publication of this story, a Microsoft representative told GameSpot that the Tesco product listing is "not indicative of a Halo product launch."
"This listing is not indicative of a Halo product launch," the representative said. "We have no news to share of future Halo titles."
The original story follows below
The listing includes generic Xbox 360 box art and a 2013 release date. A Microsoft representative was not immediately available to comment.
Microsoft is openly hiring for the future of the Halo brand, which may include games for the company's rumored next-generation platform, believed to be announced next month. The Halo team is seeking, among other developers, a person with MMO experience.