Press ~ and then submit the following codes to enable a cheat which allows the desired result:

Toggle enemy God mode -- aigodmode <0 or 1>
Toggle protectee God mode -- aiprotectprotectee <0 or 1>
Toggle God mode -- god <0 or 1>


Press ~ and then submit the following codes to enable a cheat which allows the desired result:

Toggle enemy AI cannot hear you -- aidisableears <0 or 1>
Toggle enemy AI cannot see you -- aidisableeyes <0 or 1>


Press ~ and then submit the following codes to enable a cheat which allows the desired result:

Toggle no clipping -- noclip <0 or 1>