uddrag fra walkthrough:
Once you get past the guard towers, continue up the stairs and look to your left. A small lounge is filled with three soldiers. They're indoors, so you'll have to shoot through the windows to take them out. Inside are a Medical Console and Charger Station. Things you probably need right now, especially with that Gunship behind you. No, really. It's there. Quickly drain the chargers and then continue through the prison yard, you're gonna have to find a Rocket Crate. Fight your way up the terraces to the Rocket Crate, taking time to use your Antlions on the Soldiers. Once you take out the Gunship... another one appears! Repeat procedure!
You'll probably be hurting by now, so take a chance to retrace your steps and pick up any Medkits and Batteries you can find. Ouch. Two in a row. There are a number of Medkits in the immediate area, including one in the dumpster. Once you've done that, look for the Hole in the prison wall. It's on the same terrace as the Rocket Crate. You'll need to find a barrel or a crate to stand on to get inside.
Once inside, look for the large red Wheels - Those are gas valves, and will shut off the gas feeding the fires blocking your way. The wall will collapse behind you once you're a few meters in, cutting you off from your Antlions. For now. You'll see them again.