Nevertheless, Bethesda has no plans to release an offline mode for Fallout 76, partly due to technical reasons.
It is a server-based game. I do not see ourselves completely reworking it in one way or another to be a disconnected game that is completely client-based.
Pete Hines (@DCDeacon) August 25, 2018
Pete Hines, Senior Vice President of Global Marketing and Communications on Bethesday, explained the reason in answering a question on Twitter asking if there would be an offline mode. Hines pointed to Fallout 76 as a server-based game, and insinuated it would take some major re-encoding to release a client-based component.
The good news for players who do not like playing on teams is that although Fallout 76 is an online game, solo experiences will be possible. However, Bethesda pointed out that E3 would be more difficult to play solo. "The easiest way to survive in the wilderness is to gather and build together," Bethesda said.
Fallout 76 is set near the beginning of the post-apocalyptic world in 2102, otherwise known as the Reclamation Day, just 25 years since bombs fell. Much of the open world landscape will be intact, compared with other titles in the series. Bethesda describes it as an "undisputed wasteland," and finds that it will be the newest and most dynamic world in the Fallout universe.