When you’re ready to go, use your gravity gun to pull the plug in the corner. You should be able to find some SMG grenades. Grab the crossbow in the corner and make sure you break open all the supply crates. Wait by the door and give them a good shotgun blast or 2. Just 3 Combine soldiers with shotguns and SMGs. The Combine are preparing another breach. Advance through them and look at the door. Safely set them off from a distance with a pistol shot. Then go forward and move the explosive barrel away from the next set of mines. Kill the zombie torso before it trips the mine. Then use the fuse box to unlock the doors and rejoin Alyx. Once the barrels stop exploding, drop straight down. Drop it right through the tripwire to blow up most of the explosives before you drop down. Crawl along until you come to the next vent in the floor. Drop down to the ledge on the right and knock off the vent.

Walk along it and grab the ladder.Ĭlimb up and carefully get onto the beam. Walk along the edge and jump over to the other side. Be careful to not touch the barnacle tongue though, since it will drop you back to the lower level.

You should be right back where you started, except on the rail. Climb up and come out carefully on a little part of the elevator support.

Jump through the hole and then push the table to the left. Kill the poison headcrab inside the little room with the broken window. Put 2 shots into a barrel and then duck below the water. If you want to do the puzzle right, you just have to crouch under the 2 tripwires and jump through the broken window. If they start to pull you up, just turn around and shoot them with the pistol. There are 2 barnacles above you and they like to grab you as you jump out of the water. Swim through the hole and jump out at the next level. Use the gravity gun to knock off the roof panel. The elevator doesn’t work though and quickly sinks. You should be able to make it over without setting anything off. Drop down to the bench and position yourself for a clear jump over the tripwires. You need to knock out the vent on the top of the pipe. I once survived a full explosion with only a minor hit, but that’s a rare exception.

The whole room is wired to blow and it should kill you if it does. The collapsed pipe lands in one very dangerous room.

Halflife 2 episode one walkthrough