After the accident, when you go to the area where there
is a scientist sitting on the floor and another is comforting
him, enable the /impulse 101 code. When the man that is
sitting down is talking, beat the standing man with your crowbar
until he dies. When the old man is done talking, the dead man
will talk to you.
When you are done with the first part, after all of the destruction
starts, you will be in a room where two scientists let you into
the machine that you put the sample in. If they are dead, then
this trick will work -- it is after the accident, and not before.
Enable the /impulse 101 code and use the eye scanner that
is lop sided, next to the door. Go through when it allows you
to and you should see a scientist giving Barney CPR. Use any weapon,
preferably the crowbar, and hit Barney. He will talk even though
he is dead on the ground.
Kill A Barney or Scientist. If the body does not disappear, crouch
next to it. Press [Use] and the Barney/Scientist should
talk.
Strategy: by Stalker