Find this file ConfigDefaultInput . i n i s t e a m a p p s c o m m o n A R K S h o o terGameConfigDefaultInput . iniCopy it and save a copy to the same folder this will be your backup so that if you make a mistake you have a reference like this M y O riginalConfigDefaultInput . ini right click and change the properties of that file to READ ONLY . Now Open the original file with Notepad or better still Notepad You can now just change the entries as needed like this exampleYou can delete the part NumPadZero A c t i o n M a p p i n g s A ctionNameSelectOrderGroup 10 , KeyNumPadZero , bShiftFalse , bCtrlFalse , bAltFalse , bCmdFalse A c t i o n M a p p i n g s A ctionNameSelectOrderGroup 10 , Key , bShiftFalse , bCtrlFalse , bAltFalse , bCmdFalseThis turns off the key for that action . Now you can find the entry for jump A c t ionMappingsActionNameJump , KeySpaceBar , bShiftFalse , bCtrlFalse , bAltFalse , bCmdFalseand replace the SpaceBar with NumPadZero A c t ionMappingsActionNameJump , KeyNumPadZero , bShiftFalse , bCtrlFalse , bAltFalse , bCmdFalseAfter a short while you will see how this works and you then can edit the original file to your hearts desire remember you made a copy . After you have saved the file ConfigDefaultInput . ini right click and change the properties of that file to READ ONLY so mistakes wont overwrite your hard work . Hope this helps