Half-Life 2/Nova Prospekt

Antlions Take No Prisoners
You're actually in Nova Prospekt now. Start by breaking the two supply crates by the door to get some SMG ammo. Through the door you'll get a look at just what state the place is in - it's been around for a long time, that's for sure. Head to the stairs at the far end and go down them. None of the open cells around here have anything in them, apart from the only lit one on the bottom floor which has a hole leading through to an old, battered control room. Jump into the hole, being wary of the headcrab that's just around the corner, and you'll come out in the control room. Out the door, you can see beyond the metal bars that a stationary combine turret is killing your antlion friends as they come through the hole in the wall on the far side - do them a favour and knock the turret over with your crowbar or gravity gun. They still can't advance much further due to another turret up the stairs, but they'll either handle that themselves or you will in a moment. Follow the "exit" sign (don't worry, you're not leaving this place for a LONG time) and go up the staircase as far as you can go. You'll see the fence on the upper floor is bent allowing you to crawl through the top of it. This is good, because there's nowhere else for you to go. Get onto that floor and knock over the two turrets up here for your antlions, then head down the corridor.

You'll be back on the opposite side of the room you entered in, in the fenced-off area. In the control room here is a health and suit recharger, as well as a surveillance monitor you can use to look at some of the areas you'll be travelling to soon. Go to the end of the fenced area and up the stairs as far as you can go. You can blast the door to the side room on the right away to reveal a supply crate containing some grenades. The side room to the left contains nothing, so turn left and take out the two turrets. Wait for them to stop madly firing, then go through the door behind them. The next room's floor is covered with water, and there are barnacles above the walkways you need to travel on, so kill them and proceed to the next room. Climb up the rubble and open the double doors in front of you. As you walk forward, a load of fast headcrabs will come out of the hole you did, so deal with them. You'll be in the room your antlion friends were coming in from before; go around to the other end of the railings and drop down through the broken bit of walkway (be careful, as a turret beyond the bars in the next room may take a few shots at you). Once you've gone down you can enter the bottom of the next room. Use grenades to dispatch the two stationary turrets overlooking this room, then smash the boards by the side of the double doors you can't open. You can't go anywhere on the other side but there is a supply crate containing a grenade, and a lot of suit batteries and a medpack for you to get. Climb back out and head along the corridor at the top of the room (where the turrets were), and you'll be presented with a loading screen.