The text "Бесплатная загрузка Subnautica (v07.02.2023)" refers to a "Free Download" for specifically citing the February 7, 2023 build. This particular date corresponds to a minor technical update (Build 10497394) released for the game on SteamDB .
: Developers from Unknown Worlds have explicitly stated that the game is not free and that unofficial "free download" sites often distribute pirated copies that may contain viruses, keyloggers, or other malware .
The specific build from February 7, 2023, primarily included: Subnautica update for 7 February 2023 - SteamDB