Throw a grenade in here to kill the Vortigaunt. Now take out your crowbar and crouch under the left glass pane to proceed to the next area. Grab his Glock pistol nearby (you may already have one if you killed the first security guard). Now go through the passageway to see a dying security guard (there's no way to save him). scientist scene, and the room across from here has a rather frightning display. Crouch under the vent and go down into the next area.Īvoid the fallen vent in the corner, as a headcrab will jump out of it once you get close. Jump on the first fallen machine that's blocking the doorway, and then jump on the one in front of it to get to the vent. There's another vent in the top right corner which we need to get to. Use the nearby health station if you have to. Now crouch under the small vent to go into the next room. The security guard that you left behind serves no purpose now, so you can either kill him for extra ammo or just leave him there. Jump on the machine near the doorway and then jump to the next one to get to the vent.