Ok at the start of the game when you get of the tram a barney will let you in a small room. Now there is a glass door the barney will start to walk over and open. We need to stop this to soft-lock yourself. To stop the barney crouch jump onto the little lip on the right of the glass door like this when the barney trys to open the door since you are on the lip the door gets stuck on you. Then for some reason instead of crushing you the door goes back to being closed. And the barney will not try to reopen the door! Now you are stuck FOREVER with the friendly barney! Have fun!

I made a guide on how to soft-lock halflife and opposing force: https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=2511648755

https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=2703704493