More details leaked:
When Bethesda announced Fallout 76 with a teaser trailer this morning, promising more information at E3, it was easy to assume that the new game would be a traditional single-player role-playing game. But Fallout 76 is in fact an online survival RPG that’s heavily inspired by games like DayZ and Rust, according to three people familiar with the project.Originally prototyped as a multiplayer version of Fallout 4 with the goal of envisioning what an online Fallout game might look like, Fallout 76 has evolved quite a bit over the past few years, those sources said. It will have quests and a story, like any other game from Bethesda Game Studios, a developer known for meaty RPGs like Skyrim. It will also feature base-building—just like 2015's Fallout 4—and other survival-based and multiplayer mechanics, according to those sources. One source cautioned that the gameplay is rapidly changing, like it does in many online “service” games, but that’s the core outline.