Ok, sorry if this is covered in the tuts but i wanna ask here rather than search for it (I'm in college )
Ok so i wanted to make a scene similar to that in HL. Barney doesn't let you through the door without your HEV. Good barney! Doing his job well. Shame about the death and stuff 15 minutes later.
Anyway, i want to make a similar scene in one of my levels but i can't get barney to deny access and then allow it next time he sees me (With hev)