GameUserSettings.ini is the main ARK server config file - max players, multipliers, passwords, harvest rates, all live here. AASM exposes its settings across several Server Settings sub-tabs so you don't have to hand-edit the .ini.

Prerequisites:

A server already added.

Which tab holds which settings

Tab	Common settings
Player Settings	Max players, admin password, spectator password, server password, character level cap, XP multiplier
Dino Settings	Wild dino level multiplier, taming speed, dino food/water drain, mate boost, dino count caps
Environment	Day length, night length, weather intensity, weight/stack multipliers
HUD and Visuals	Crosshair, third person, floating names, map visible toggles
Structures	Structure decay, structure density cap, prevent grief PvE, etc.
Chat And Notifications	Cross-tribe chat, chat range, broadcast settings

Step 1 - Open the server's tab

From the Dashboard, click the server name in the tab strip. The server tab opens to Server Settings by default.

Step 2 - Pick the sub-tab for the setting you want

Use the reference table above. For "set max players to 100," that's Player Settings. For "double the wild dino spawn level," that's Dino Settings.

Player Settings sub-tab with various tunable values

Step 3 - Change the value

Each setting has either a numeric input, slider, dropdown, or toggle. AASM validates the value (e.g. multipliers can't go negative).

Step 4 - Click "Confirm Saved"

At the top right of the server tab, click Confirm Saved. AASM writes your changes to GameUserSettings.ini using atomic writes (no half-written files even if the host PC crashes mid-write - v0.8.2 atomic-write guarantee).

Step 5 - Restart for changes to apply

ARK reads GameUserSettings.ini at server startup. Restart the server for most changes to take effect. A few settings (like server password) can be applied live via RCON, but config-file changes always need a restart.