Grab your best post-apocalyptic pals, a few bottles of Nuka-Cola and get out on the water, because Fallout 76’s next update is making a gigantic splash. The Gone Fission update kicks off with Season 21 on June 3. Grab your best post-apocalyptic pals, a few bottles of Nuka-Cola and get out on the water, because Fallout 76’s next update is making a gigantic splash. The Gone Fission update kicks off with Season 21 on June 3.