Halo 4 has sold approximately four million copies worldwide, according to the latest franchise sales figure published by Microsoft.
In a press release issued today relating to the Halo 4 Infinity Challenge, Microsoft revealed the Halo franchise has now sold more than 50 million copies worldwide. Prior to the launch of Halo 4 Microsoft said Halo franchise sales stood at over 46 million. That's a four million increase in the month following the release of Halo 4.
In addition, franchise development director Frank O'Connor has told CVG that work on the next game in the Halo franchise began even before Halo 4 launched.
"A lot of people at 343 are already prototyping ideas and software and art for future Halo products," said O'Connor.
"I can't say more than that, but work on the game started actually before we launched Halo 4 and continues apace as we cycle staff through the team's vacation breaks. We're excited about the next game."
Notice that O'Connor didn't actually call the new game Halo 5, but given Halo 4 was the start of a new trilogy, a fifth numbered game is expected.
In the meantime, Halo 4 fans can look forward to plenty of new content in the year ahead.
"Spartan Ops season 2 is yet to be decided, we're looking at how the first season does," said O'Connor.
"We got such great responses from [live-action web series] Forward Unto Dawn and Spartan Ops that we're pretty happy with it and we're learning a lot of really interesting stuff for the future," he added. "You are going to see a spectrum of Halo support though the next year and beyond."
Source: CVG | Press releases