Fallout 76 was right in front of us all along.
At the very beginning of Fallout 4, right before nuclear war drives your character into Vault 111, a television program can be seen touting the debut of Vault 76 in honor of America’s 300th anniversary. Eagle-eyed Redditor Star_Belenski spotted the Bethesda tease on Monday, and took a screenshot of the sneaky hint.
“Since debuting Vault 76 last year, in honor of America’s Tercentenary, Vault-Tec continues to expand with plans for well over 100 Vaults around the country,” the news report says in Fallout 4, shortly before the main character must evacuate with their family.
Source: IGN.com Fallout 4 Teased Fallout 76 in the Very Beginning of the Game