Since the release of 2015's Fallout 4, Bethesda's recent returns to the world of the Fallout series have largely been in the form of spin-off games. These have included the mobile app Fallout Shelter - also released in 2015 - and the MMORPG Fallout 76. Fallout 76 is still ongoing, with frequent large updates providing new story content and game mechanics for players to return to as well as an expansive online community of other players. It isn't included on this list since it's an MMO with new content coming out regularly, but it would add to the total playtime considerably.