you don’t have to add another seen for the execution you just replace the line of dead bodies with an active one that the player just happens to get there in time to witness. the reason I think you should see the execution but not be able to prevent it (being blocked off from it or just to far away) is to add to the reason to keep going and to to feel of crap I caused this which is going through out the game. jsut seeing the after math doesn’t give much emotional response as seeing it happen. body lying around mean nothing but seeing them alive jsut a few seconds earlier adds to the drive.
(might need to reword that because of over describing)
I think I understand where you are going with not seeing any alive scientists in the uncut as they did do that in half life up till the end of the chapter. seeing some alive scientists held out in part of the office with at least one guard with them might help the area or might hurt it depending on how you do it, if its in an obscure area that is more hidden an out of the way (liek a janators closest or tram maintenance area) it would help. but if it was on a main path from the office area it would hurt… how about putting them just behind the door where you had all thoughs batteries in the video.
what I am thinking
move the batteries into that room and place a barricade in it have 2 scientists in it (use the couch couple animations from half life) and one guard with a shotgun or revolver. the guard will not follow you and the scientist are to busy being scared to talk. (would re move need for lines)… I think there are some generic lines for the guard that you could use for that situation.