These are the changes of ARK: Survival Evolved’s Patch 180.41, grouped into categories for clarity. If not otherwise indicated, they’re quoted from the relevant Steam Thread.

Gamesettings

• Freshly-installed Singleplayers no longer have zeroed-out Local/Host gameplay settings, and added “Reset To Defaults” for Local/Host gameplay settings.

(Original Announcement on Steam)

Here are the patchnotes of the previous patch (180.40)