Sub-1 hour hardcore glitchless run made possible by the new unstuck feature.
There are dumb mistakes but it's still a pretty cool run I suppose.

The "unstuck" menu item was added in the December 2022 update. The game keeps track of 10 of your previously visited locations and each use of unstuck brings you backwards to each of them. On the 11th unstuck the game brings you to the last base you exited. The game also won't add your location to the unstuck queue while inside certain alien bases. All of this is useful for warping long distances.

Unstuck is currently allowed in glitchless categories. I only used it for large time saves here. It can be used to save a small amount of time in far more places but I felt like that would get annoying for everyone, especially me.

Also new in this run is the use of a tool "LiveSplit Ship Explosion Information (1.0)" developed by some fine folks in the Subnautica speedrun discord. This tool is an addon for Livesplit that shows the current Aurora explosion time at the start of the game rather than having to find out many minutes into the run. This tool is available at www.speedrun.com/subnautica/resources.

In my experience it cuts the time needed to grind for a WR candidate run by 10x or more. I feel weird using it, but it's allowed in runs so I'd be wasting time by not using it.

If you have questions about the run, most are answered in my video here:    • 10 Common Questions About Glitchless ...  
I'm happy to answer any questions not covered in that video.
✌