Subnautica V16.06.2023 [repack] -

But the Echo is down there, at the lip of the brinefall. It doesn’t come up. It just tilts that spiral face. And sings again.

It followed the massive "Living Large" update (released in late 2022), which unified codebases between the original game and Below Zero , adding Large Rooms and various quality-of-life features. Technical data suggests the June 16 update involved depot changes Subnautica v16.06.2023