Earlier this week, Fallout 76 was updated to bring the new Project Paradise event into the game. Project Paradise allows players to take part in a cooperative venture with others. When the event opens up, players will head to the "cavernous Biome Labs" that lay beneath Arktos Pharma. The goal is to work with other players to feed and protect the Appalachian creatures in the experimental labs. Doing so will yield high-end loot and XP for players at level 50+.
Most notably, players can look forward to a three-star boss spawn that, once defeated, will reward participating players with a three-star legendary item. This is, of course, dependent on the success of feeding and protecting the animals within each of the three biomes.
It's worth noting that the event is not announced server-wide. Players will need to keep a keen eye on the world map to be able to participate.
Check out the full update notes on the Fallout 76 site.