Half-Life Walkthrough

Headcrabs seem a little tougher now that you don't have any big guns! Make your way to the big tower and spin the flow control wheel, which will raise or lower the platform inside. You'll want to get on it while it's going down. Go through the ventilation shaft you'll see.

Inside will be a guard taking care of some headcrabs for you. Wait for him to run away and then follow him. You'll find his corpse (or what's left of it). Take the pistol.

Return to the room you jumped down into, and climb up the side of the big nukage vat. Jump from debris piece to debris piece, and go down the pipe.

Next you'll come to a vat with two big stirring devices. Wait until they point to each other to move from one to the other, and keep moving along the pipe.

The next room has a whole set of vats with big plungers going up and down. Hop on the tops of the plungers as they're going down or up and make your way across to the next pipe.

Your path will be pretty straightforward. Duck under all the big grinding machines and you'll eventually come to a room with three conveyor belts emerging from a pool of slime. Press the three switches so all three conveyors are moving forward, and then go to the control room and press the button to stop the crushers from operating. You'll have to move quickly since they'll turn back on after only a short time.

Keep riding the conveyor, being careful not to get squished.

Hop down the conveyor belts until you get to two right next to each other. Take the left one, but watch out for two tripmines blocking your path.