It's available for Fallout 4 on PC (via NexusMods and ) and Xbox One. It doesn't hack anything that already exists in your Fallout 4 save to avoid compatibility issues. This Fallout 76 mod doesn't depend on any of Fallout 4's downloadable content (DLC) and does not alter any of the base game's code or assets. If you don’t get irony walk on by,' a post from the modder reads.
This mod is for fun to try out some of the likely game mechanics. 'I am pleased that Bethesda is bringing the Fallout franchise to new audiences, and understand the scepticism of existing single-player fans. According to SKK50, Fallout 4-76's default setting would let you run from Vault 111 to Diamond City in under 10 minutes in real time 'minutes without meeting another human, taking a nuke strike and griefing on the way.' It will hide non-playable characters (NPCs), spawn random human grievers, and allow NPCs to launch nukes at you. Thanks to a modder with the handle SKK50, you can experience what Fallout 76 could be in the setting of Fallout 4's Commonwealth with a mod called Fallout 4-76.
If you can't wait for the Fallout 76 beta, you can get a taste of what the game has to offer with a Fallout 76 mod for Fallout 4.