ARK : Survival Evolved The Primitive+ DLC Installation Guide
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Stop your Game Server
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Press the new button and give the command line a name in the description box.
In the total conversion text field you will need to enter the mod id 111111111, and then tick the box to the left of it.
Save the command line, and then on the right of the command line you will see a select button. Click this to activate the command line.