In an interview with video game Web site VG24/7, lead War Games designer on Halo 4 - Kevin Franklin - said Halo 4's episodic campaign will take places six months after the events of Halo 4's campaign. Spartan Ops is an episodic campaign that runs for 10 weeks across 50 episodes, it was previously revealed.

"It takes place six months after the events of the campaign, but as you've seen in the cut-scene [shown at Microsoft's E3 press conference] the [UNSC] Infinity features in also the campaign. So we have some ties in the story between the two," David Berger - developement manage on Halo 4 - of 343 Industries said.

A leaked ExpertZone survey revealed 50 episodes will span over 10 weeks, for free, with around 12 hours of content in total. That works out at 14.4 minutes per mission on average, which lines up with what creative director Josh Holmes said during Giant Bomb's E3 Day 3 podcast.

"[Y]ou're getting five missions per week, with a CG cut-scene, for free," Franklin also confirmed. It has been speculated that a second season would be paid content, considering the length of Spartan Ops is the same as past Halo campaigns.

The interview went live July 4, but it was during E3 2012. During the industry's biggest event, a campaign demo was also shown off about a third into the campaign featuring Master Chief encountering a new enemy: the Promethean. Prometheans are Forerunner A.I., probably from the Forerunner planet Chief crash landed on: Requiem.

War Games is the umbrella for Halo 4's multiplayer content, including Spartan Ops. 343 Industries has consistently spoke about bringing a greater narrative to all aspects of the title. The battle between the red and blue team in competitive multiplayer is a simulation: maps are generated by the UNSC Infinity, the ship from where Spartan Ops is launched and which is crashing in the E3 campaign demo.

It was also recently revealed Halo 4's multiplayer will require 8GB of hard drive space, bad news for users with 20GB or 4GB Xbox 360 consoles.

The E3 2012 campaign demo is below. Halo 4 releases November 6 on Xbox 360.