The mysterious new 'Fallout' game is reportedly using the same survival formula that's seen wide success in other online games

Rust is a game developed by Facepunch Studios, which was heavily inspired by Day Z. It was released in early access in 2013, and fully released in 2018. 

While Rust is also an open-world survival game, the threat comes almost solely from other players instead of zombies. The survival elements are similar, with players required to eat, drink, and tend to wounds, but the addition of a crafting system made the game stand apart from Day Z. Players can craft weapons, clothing, shelters, and other game elements to give them an advantage over the environment and other players. 

Since Fallout 4 introduced the concept of shelter building in the Fallout franchise, it's likely that Bethesda developers pulled from this game for inspiration on how to make that work in a multiplayer setting.

However, Rust's final release received only average reviews, and by 2018 it seemed that consumers had become tired of the open-world survival genre. 

According to the three people with insider knowledge that Kotaku spoke with, Fallout 76 will be an open-world survival RPG game. Fallout 4 introduced base/settlement building to the series in 2015, and the sources confirmed that this gameplay aspect will also be present in Fallout 76. 

The survival and RPG elements are nothing new to the series, but Fallout has never had a multiplayer mode before. This is similar to the approach Bethesda took with Elder Scrolls Online, the massively-multiplayer online addition to the Elder Scrolls series, which was also traditionally single-player until that release. 

As the game's title suggests, the newest Fallout will be centered around Vault 76, a location that has been hinted at in previous Fallout games. Rather than keeping its inhabitants safe for hundreds of years like most of the other vaults, Vault 76 was meant to be opened 20 years after the nuclear war ended, according to Fallout lore. This likely means that there will be little to no developed civilization outside the vault, which is seen in other Fallout games, which could make the survival element even more brutal this time.