Half-Life giving you a headache? Lost in a labyrinth? Phil Wand gets you back on the straight and narrow
1. ANOMALOUS MATERIALS
Once in the chamber, climb the ladder and press the button when asked. Climb down the ladder and push the cage into the beam when the sample appears.
2. UNFORESEEN CIRCUMSTANCES
Make your way back up to the computer room. Go out through the vent, get to the ladder and bear right at the top. Drop down the hole, find the valve and flood the chamber. Swim to the other side. Find the goods lift and ride it to the top. At the catwalk, follow the pipes, crawl along the duct and jump across the boxes to the antechamber. Swim to the other end and follow the walkway to the door. Use the boxes to get across the next room, then follow the corridor to a ladder. Ride the lift.
3. OFFICE COMPLEX
Avoid the wire and use the duct. Turn off the power, go back to the corridor and break the glass. Turn left towards the wooden door and keep going. Turn off the switch, open the grate and follow it. Drop down and run for the exit. Go up the stairs to the office area. Keep going to the boarded doorway, press the switch to get into the meat storage room and head left. Activate the trolley, climb the ladder and crawl along the duct. Get on the trolley and enter the next duct. Jump up to the open conduit, follow it and then go up the stairway. Climb through the window. Find the lift shaft and jump to the ladder on its opposite side. Go right to the top, drop down and open the doors.
4. "WE'VE GOT HOSTILES"
Get to the kitchens, climb the crates and keep moving. Up the ladders, then ride the lift. At the next junction duck right and use the conveyor. Climb the crates up to the other belt. Go round the corner, jump down and head away from the lasers. Climb the stairs and cross the bridge. Ride the lift, then head left to the door. Go down the ladder. Now open the door at the bottom and take the ladder down. Take the bottom and then the centre shaft. Press the button to enter silo D.
5. BLAST PIT
Ride down on the lift to the train. Jump across to the platform and climb the ladder. Follow the pipe, climb to the balcony and then to the lift. Enter the silo at the top. Leave the Control Room and climb the ladder. Tentacles only respond to noise and movement, so stick to crawling. Throw a grenade down to distract the Tentacle, then climb down and go through the door on the second storey. Get to the Fuel Room, take the ladders down, walk along the conduits, bear left and then climb the ladder. Follow the corridor to the door. Go down the ladders, switch on the fan and dash for the ladder. Jump into the moving air. Climb into the vent, take the first ladder down and push the Oxygen and Fuel buttons. Climb up to exit and head back across the bridge.
Jump over the breach and cross the bridge. Follow the corridor, ride the lift and jump to the ladder. Walk to the platform and press the button; get across to either of the ladders and climb them. Find and push both buttons to start the reactor. Get back to the entrance and climb up the ladder. Go back to the Control Room and get to the bottom of the pit. Climb down the ladder and swim under the tubing. Walk to the pipeline and turn the valve. Drop down and walk along the pipe; eventually you emerge in a room filled with boxes and trip mines. Make for the corridor.
6. POWER UP
Avoid the Gargantua and duck right into the passage - follow it until the ground gives way. Make for the Power Generator and open the door. Go up the ladders, down the corridor, up the ramp and then to the right. Throw grenades into the lift shaft to disable the lasers.
Take the stairs after the lift, find the generator and smash the crate. Activate it from the Control Room. Make for the elevator, go up and back to the Track Control Room. Just before, climb the ladder into the corridor. Get the attention of the Gargantua and run into the newly opened chamber. At the far side, use the stairs and then the switch to zap the monster. Go down, through the door and into the main area. Jump aboard the goods train and chug along to the Track Direction Controller. Now get off and find the Track Control Room. Press the button to swap the points. Get back on the train.
7. ON A RAIL
Get off the train and push the button. Drive onto the lift and ride it down. Drive on until you see a small chamber with a stairway. Follow it to the crane controls. Get back on the train and get going. Shoot the points switcher so you head left. Use the lift and ladders to get to the second storey. Continue your train journey, pushing the button to remove the barricade. Slow the train and get off whenever you see blue lasers. Push buttons to remove the barricades, and take a replacement train at the next opportunity. Stop a long way back from the next obstruction so as to take out the soldiers. Find the switch and get back onto your train.
Drive onto the lift and ride up - but get off before the corner and the traps. Get back onboard, and at the next points switch make sure it faces up the track. At the terminus, walk down the track and head upstairs. Press on past the shielded door. Use the boxes for a makeshift ladder to avoid the lasers and stairway. Launch the missile from the button in the Control Room. Go back outside, and through the blast door which is now open. Go down the ladder and climb aboard the transport.
8. APPREHENSION
Jump off of the transport when the explosive is lobbed at you. Dive into the flooded chamber. Find the opening at the bottom of the pool and follow it. Gulp some air and keep swimming. Find the grate, break through it and swim on to a chamber with plenty of ammunition. Go through the door and get out of the water. Follow the walkway to the ladder, walk the joist and nab the crossbow from the cage, which will fall into the pool. Turn the valve to open the lattice. Swim under, go up the stairs and then left at the top. Enter the hallway, go along the walkways and duck through the hole in the fence. Now find Generator Control.
Take the passage on the right, then activate the generator. Drop down and approach the centre piston. Get onto the bottom pedestal and onto the piston when it drops. Jump off and drop down. Climb the ladder, go down the corridor and up the stairs. Open the door to the freezer and climb down the ladder. Follow the pipework to the lift. Climb the stairs and open the doors - be quick to avoid the garbage compactor! Now follow the ledge, climb down the ladder and go through the grating.
9. RESIDUE PROCESSING
Crawl along to the outdoor area, approach the silo and turn the valve. Climb the ladder and ride the lift down. Flick on your torch and follow the tube to the grating. Walk along the corridor to the Observation Area. Now go back to the plant entrance, climb the ladder up the side of the vat and leap across the debris. At the end of the pipe, jump across the platforms and press on. Go along the piping and exit the next room. Go across the toxic waste and onto the conveyor belt. Follow the stream, avoid the masher and make your way along the passage. Go back into the water and swim under the other masher.
Climb out and find a Control Room with the three levers. Get all three conveyors moving away from the water, and go back to the room with the dead security guard. The button stops the hammers - stop them when the centre and right hammers are fully raised. Jump on the right-hand belt ,and move from belt to belt, following signs to the Exit. Take out the blue lasers with a well-aimed satchel bomb and avoid the rollers. Drop down as the jaws open, then get off the conveyor and go through into the antechamber.
10. QUESTIONABLE ETHICS
Climb the ladder and go through the grate. Get over the fence and go down the corridor. Press the red button to free the Grunt. Enter the Control Room and press the button when the Grunt follows you in. Exit, go up the ramp, climb the stairs and go round to the other lab. Open all the cages and dash to the Control Room. Exit, take a right at the junction and walk down. Walk into the open passage, then go up the steps. Get the Gauss Gun and push the button. Go to the hallway and push the second button. Go to the room at the end and push the third button. Walk down the corridor and activate the fourth button. Enter the room where all the lasers point, push a box under the laser shield and activate the beam. Go through the hole and down to ground level. Find the room with the Surgical Equipment and deactivate it. Keep moving.
11. SURFACE TENSION
Get to the opening in the rocks. Wait for the chopper to go, then head for the dam and leap in. Push the Turbine Control button, go back into the water and turn the valve. Swim through to the ladder, climb it and enter either tube. Climb the next two ladders and enter the small opening through the rocks. Open the valve in the stone hut, then follow the wall round to the right. Enter the opening behind the boulder. Clear the fence and jump down.
Follow the ledge. At the metal doors, head for the cave. Take out the chopper with your rocket launcher and continue to the next ladder. Up the ramp, and leap from ledge to ledge. Get to the second ladder and climb into the drain. At the junction, turn left. Now head for the pathway and the door at the end. Go around the right-hand side of the building, down the steps and enter the minefield. Get to the far side and shoot the canisters alongside the generator. You can now get to the roof. Walk along it to the opening and press on. Open the metal doorway and find the lift. Go up the stairs and ride the lift down. Grab the Hornet Gun.
Follow the passage to the truck. Go up the ramp and dash past the armoured transport into the alleyway. Go up the stairs, out onto the ledge and around to the right. Jump to the fire escape and then to the roof. Head for the opposite door. At the hangar, go down the walkway. Open the doors and use the big guns to deal with any trouble. Take the organic trampoline to the next level. Find the duct, follow it and drop down. Lower the big lift when the wall is destroyed, then jump through and blow the door with the gun emplacement. Climb up, across to the walkway and into the antechamber. Down the corridor, find the organic trampoline to get onto the roof. Drop down to the water and follow the pipe to the end. Turn the valve and get to the Control Room.
Climb the ramp to avoid the Gargantua. Trampoline to the tower. Use the map to air-strike the beast, the metal doors and the wall to their right. Aim the last strike at the other tower - this will be your bridge. Go down and through the doors.
12. "FORGET ABOUT FREEMAN!"
Clear the railing, head right, up and open the hatch. Down the ladder, then across the water to the platform. Push the crate into the water and use it to jump over the gateway. Round to the left and dive in. Find the passage past the next series of cogs, climb out and go up the ladder. Get to the lift, ride it to the top, go down the corridor and head right. Up the stairs, then use the tank to blow the door. Follow the passage left to the door. Press the button.
13. LAMBDA CORE
Climb aboard the goods lift, climb the ladder and go through the doorway. Head right, then take the stairs. Follow the left passage to the lift. Open the door, climb the ladder and on to the reactor. Take the lift and turn right. Grab the EGON, leave and go down the hall.
Follow the blue stripe to Pump Station 01, and turn on the pump. Follow the orange stripe to activate Pump Station 02. Jump the gap to the next Pump Station, turning the valve on your way. Push the button and head for the Auxiliary Tank Reactor. Drop into the tank and wade to the core. Turn both valves, then climb the ladders. Get to the lift, climb the ladder and jump to the doorway. Down the passage and around the corner. Make your way to the Level B Core. Enter the portal at the base of the core, then portal 2. Go under the ductwork and enter portal 4. Now portal 7 into another teleport room. Get to the central platform and head for 01 and 02 - find the switch in each of these areas which half opens a door to the teleporter. Drop from the outer platforms into the centre when it's fully lowered, then get to the central platform. Heading outward, skip the middle platform.
Once out, climb the ladder and go through the glass doors. Get the Jump Pack and get into the Portal Control Room. Climb the ladder and then duck-jump into the portal beam.
14. XEN
When you enter Xen, you need to long-jump your way across the platforms to the structure in front of you. Use the pools to boost your health. Look for the small opening in the stone - go through and climb through the hole. Activate the mushroom switches, then smash the cage. The contents will activate the portal.
15. GONARCH'S LAIR
Wait for Gonarch to arrive. Aim your firepower at the sac. When she scarpers, enter the cave and keep up a sustained attack. Chase the monster, and drop through the hole into the portal.
16. INTERLOPER
Head for the far cavern. Fall into the pit and bash the web to fall again. Follow the passage, and ride the pillar up. Use the platforms, and hitch a lift with a Blue Manta to the portal. Run out of the cavern, clear the ridge and get to the opening. Jump across the rocks, into the cave and the passageway beyond. Use the teleporter to enter the factory. Follow the ramp and ride the lift. Get to the conveyors and follow them to the water. Follow the corridor at the end and use the pistons to get to the next level. Take the passage on your left from the Canister Store and climb into the red ducts. Go up the ramp onto the rotating lift platform. Get to the spiral ramp, onto the second and third rotating lifts. Step into the teleporter.
17. NIHILANTH
Avoid all electrical charges and teleports. If you do get snagged by a portal, you'll end up someplace else. Nihilanth lives off his power source - this is what you need to destroy. Shoot the glowing crystals and then start on the creature. Once his energy has dissipated, use the organic trampolines to get above him and fire into his brain - yummy. Once you've scored enough hits, that's it. You've won!
