That's the biggest feature coming with version 1.5 of the 2015 game. Survival Mode aside, the update will also come with bug fixes, many relating to the recent Automatron and "Wasteland Workshop" expansion packs. Players on PS4 will also have the ability to delete add-on content from within Fallout 4.
The revamped Survival Mode is currently in beta on Steam, giving Fallout 4 players on Windows PC extra time to test out its new challenges. These include new perks, increased limitations on saving and the amount players can carry, and heightened susceptibility to fatigue and illness. Thanks to these and other additions, Survival Mode serves as the highest level of difficulty Fallout 4 has to offer.
Official mods aren't currently supported by the beta, but Bethesda said that it plans to include them on the PC version "soon;" consoles will receive mod support in future updates. The mod Creation Kit, allowing players to create and share their own mods within the game, is currently in closed beta on Steam.
The next major addition to Fallout 4 is Far Harbor, the third expansion pack that's coming to the game on PC and consoles later this year. Version 1.5 will also add support and optimizations in anticipation of the downloadable content. Far Harbor follows this month's "Wasteland Workshop" and March's Automatron DLC; check out our overview of the latter pack below.
Update: The 1.5 update is expected to arrive on consoles this Friday, Bethesda Softworks said in a tweet.