According to Bubblews, who source a “leaker inside who was willing to give this information,” Bethesda showed a teaser trailer for Fallout 4 behind closed doors at E3 2013.
The source tells the site the team that worked on The Elder Scrolls 5: Skyrim are working on the game, and it has a planned release for October 2015 on Xbox 360, PlayStation 3, Windows PC, Xbox One, and PlayStation 4.
The game will be announced sometime before E3 2014, which takes place June 10, 2014, through June 12.
The source said the game is just over 50 percent complete, and will possibly include local co-op.
The game will take place in a post-apocalyptic Boston, Mass.,which has been rumored for a while.