Go straight through the large hangar door in front of you, then as soon as you enter the room look to your right. In the floor is some grating, which stretches down the length of the hangar. Shoot some of it, then fall into the gap in the floor. Make your way along until you see a red switch on the side (it's not very obvious that it's a switch, it looks more like some sort of light) - press it, and a hatch will open up in the floor (make sure you're not standing on it, otherwise it won't open). Inside are two cylinders. Shoot both with your Pulse Rifle then get out by finding the steps. Shoot the grating to get out. Now, make your way over to the airlock (near the door that you entered by). Next to said airlock is a panel in the floor, with a white tab in the corner of it that says "airlock" on it. This is actually a switch. Press it, and the panel will slide back. Press the two switches inside. The airlock begins to open. Now, if you're standing next to the panel with your back to the airlock, look to your right. There's a little "cubicle" in the wall with a kind of blue-ish tone. Go in there and press the switch inside (again, it looks more like some kind of light). The door slides over, protecting you from being sucked out. On Training and Realistic there's also a Flamethrower in here to ward the Queen away. Now, watch the Queen get thrown out into deep space and laugh very loudly. End of level