You get an ominous glimpse of a Scottish Higlander at the beginning of this level and then Lara has to slide down the slope from the previous level once more. Pick up the flares at the bottom and quickly jump forward through the doorway to avoid the oncoming spiked wall. Slide down several ramps and wait for the rolling boulder to approach down the corridor you eventually land in. Jump over it as it gets near and then pick up the crowbar on the slope (Lara seems to have lost the one she picked up earlier).

Go up the nearby ramp and through the crawlspace at the top to find an underground pool. Swim around the bottom of the pool to pick up 2 bunches of harpoons (light flares to help see them) and then exit back to the boulder slope. Go down the slope to the cave at the bottom of the ramp.

There are spikes below the doorway and a green platform in the centre. Take a standing jump to the left side of the green platform, which is flat. Walk forward to the end and take a standing jump to the grey stone ledge on the far side of the cave. From here you can shoot the red eyed dog down below before dropping down to the cave bottom. Find the exit passage but don't fall down the hiddeen spike pit in the floor.

Crawl through the exit to avoid the spike traps that spring from the walls. Pick up the small medikit from the floor between the two traps and then cautiously enter the next room. This area contains a number of boulders which roll all over the place. Enter the room down the right side of the steps and then run to the square pillar to Lara's left. When the boulders have stopped, go around this pillar clockwise until you can see a set of Desert Eagle clips.

Hop forward to the clips and then immediately hop back to avoid the boulder. When it comes to rest, pick up the clips and run to the far corner (where the last boulder came from). Turn around and you should see a rocket nearby. Stand where the rocket was and locate the exit of the room (blocked by a boulder). Run towards this but immediately turn and stop Lara behind the square pillar near the entrance.

The boulder over the entrance should have rolled away now. Run from where Lara is standing straight across the room to the far wall (run to the left of the shotgun shells). Several boulders will roll around as you run and when they all stop you'll be able to return and pick up those shells. If you've triggered all the boulders there should be none near the exit - if you haven't managed to trigger the two there, approach them carefully!

The final boulder is down the exit passage. Go into the alcove with the grenades and pick them up and then hop back into the exit passage near the final boulder and quickly back into the safety of the alcove to avoid being crushed. Now that the exit is clear you can walk down it until you find a set of steps on the left.

Climb up the stairs to the barred area and turn left (a torch lights behind the bars as you approach). Position Lara at the right hand side of the ramp and slide down into the room below. Turn right immediately on landing and step forward to climb into the room on your right. This way you can avoid being spiked by the approaching spike wall. Unfortunately, the new room also has an approaching spike wall. Pick up the MP5 clips and go forward to climb into the room on the third tier...

...where another spike wall starts moving. Take a step forward and then side step to the left until the wall in the room behind Lara has crossed behind her. Now step back to the edge of the ledge, crouch and drop down onto the second tier. If you time it right the spike wall on the third tier should pass by without harming you. Have a breather and turn around to see two sets of harpoons at the far end of the room. Pick them up.

Pull the switch near the harpoons to open a gate on the third tier and then go to the edge of the ledge between the second and first tier, crouch and climb down onto the first tier. Pick up Secret #1 - MP5 clips and a large medikit. Climb back up the ledges to the third tier and go through the gate you just opened but no further than the ledge with the small medikit. Pick it up and return to the third tier.

Find a crawlspace in the dark just to the left of the open gate (with the carved warning: "Abandon hope all ye who enter here") and climb in (well Lara would, wouldn't she?). Just inside the crawlspace, as soon as the warning music starts, turn Lara around so that she can back out of the crawlspace into the room beyond. As you crawl out, a spiked ceiling begins to descend. Stand, immediately jump up to grab the sloped ledge above and pull up. Jump and twist in the air to grab the opposite ledge and pull up.

Step forwards out of range of the spikes and use a medikit if needed. Turn around when it's safe and take a standing jump to the left, pressing [Action] to lower Lara's arc, to land on the barred ledge with the boxes of shells on. Pick them up and jump back to the previous ledge. Beyond this ledge is another room with a descending spiked ceiling and shotgun shells on the floor in the far left corner.

Position Lara at the left edge of the ledge facing the shells. Hop back from the edge and then take a standing jump, pressing [Action], to land right on top of the shells. Pick them up, turn right and run to the ledge ahead and climb out. The next set of spikes lower as you approach. Stay out of range until it's safe and then take a running jump across the middle of the room to the opposite ledge. The roof is higher in the middle - at the edges Lara may hit it and fall onto the spikes below.

At the next pit, run off the ledge from the left hand side and grab the small medikit on the floor. Run to the right and climb up onto the next ledge to avoid the spiked ceiling. Go forward to the edge of the ledge facing the narrow corridor and hop down into the safe area of floor. Walk forwards through the spikes (without harm) to the far end of the hallway and pick up the flares. Retrace your steps - still walking - until Lara is standing in the middle of the last set of spikes and then turn her to the right and position her against the wall.

Jump up to grab the vines on the wall and climb up them to safety. At the top, go right and drop onto the ledge. Hop down onto the ledge just below on the right. From there, take a running jump to the next ledge and enter the doorway on the right.

Hop down to the ledge below the doorway and turn so that the doorway and the vine covered wall are on Lara's right. Safety drop to the floor below and cross the room, staying to the right to avoid the grated area, where deadly rubble from above lands. When you're in the opening to the next room, roll and kill the mad dog that sneaks up on you from behind.

Turn again to face out over the tall room. Take a standing jump over the rubble to the ledge on the right. Follow this ledge around to the opposite corner of the room and drop onto the white corner ledge below. Pick up the flares and kill at least one of the two crows that fly in from above (the second of these may remain too far away to shoot at the moment).

Hop down diagonally onto the wooden platform and run across it to the dark section by the wall. This should prevent Lara getting crushed by the crumbling ceiling. Kill two more crows and then carefully climb back up to the top of the room by jumping from the wooden platform to the sloping block leading to the corner block. Jump to grab the rock ledge from the corner block and head back to where you killed the mad dog.

Use the vine covered wall in the corner to climb up to the higher ledge on the left and then climb into the doorway above the hallway with ledges and spikes. Turn left and take a running jump to the next ledge. Climb onto the upper part of this ledge and stand at the edge with the vine covered wall on Lara's left (behind her).

Jump straight up to grab the edge of the ledge above and haul up. From here, jump to the next ledge and climb up onto the block ahead near the doorway. Before entering here, turn around and take a running jump to grab the highest ledge in this hallway. Pull up and get some Uzi clips. Then jump back down to the ledge near the door.

Go through the hallway to a walkway overlooking Willard's library. There are three guards on duty around here and one (or two) may come upstairs to get Lara. Take them out on sight. You may be able to kill the ones that remain downstairs from above, but they can hide in the corners of the room, so expect to have to kill at least one after descending the stairs to the library itself.

Before going downstairs, climb onto the windowsill at the top of the stairs and crawl through the crawlspace on the left. Climb up several ledges to get a small medikit. Return to the stairs and descend to the library. Pick up flares and a small medikit that two of the guards have dropped and then climb onto the low, rectangular table and pick up the cairn key. Explore the remainder of the room (apart from the bookcase area) and note the chalked diagrams on the blackboard attached to one wall.

Now go to the corner with the wooden crates. Find the moveable crate in the wall next to the stack of smaller crates and pull it once. Go around to the left side of it and pull it again. Go back around to the other side and use the crowbar to break open the wooden door. Enter the room behind and pull the large wooden crate on the floor to get the MP5 clips underneath.

Climb onto the row of smaller boxes against the right wall and pull the corner crate out twice. Go around to the other side of it and push it once into the corner. Pick up more MP5 clips from where the crate was. Pull the crate in the corner (just beyond where the second set of clips was) once. Now go around to the left side and find the fourth crate, which is flush with the wooden wall, and push it into the corner. The bell chimes for Secret #2 - a large medikit.

Now go through into the bookshelf area. Several bookshelves here are secret doors, activated by pressure pads. Follow the route described here fairly carefully. First, walk into the alcove in the wall on the right. This opens the set of shelves to your left but don't go through them just yet. Turn Lara around and walk out of the alcove, between the outermost set of shelves and the free standing set in the middle.

Keep walking forwards until you hear the sound of a second secret panel opening. Then turn Lara around and retrace your steps back to the alcove. Don't go in this time. Instead, turn left and go through the right hand side of the open bookcase ahead of you. Pick up 2 boxes of shells in the room beyond.

A third secret door opens when you step towards the second set of shells. To complete the puzzle, exit the secret room through the left hand door and walk forward until you're just behind the small, freestanding bookshelf. Turn right there and walk behind the bookshelf towards the second freestanding set of shelves. Walk around these anti clockwise and then go through the secret panel in the far wall. In the room beyond is the final secret panel, leading up a long wooden ramp with warning signs.

At the top of this ramp, you emerge into a cave. Light a flare and go around to the left. A mutant dog attacks! When your jangled nerves have recovered, find the ramp leading upwards from this dark area and follow it to a window sill at the top. Climb on and retrieve shotgun shells and a small medikit. Return down the ramp and approach the open safe near the radioactive, green river. Don't fall in! Sadly, someone has rifled the safe before Lara and it's empty.

It's time to rendezvous with Lara's helicopter, so find the stone steps that lead upwards on the left side of the radioactive river and follow them to the halfway point. Here, you can cross the stream and climb into an open area with a rocky hill in the middle. Head left and look for a low, square stone near the sunken wooden boxes. Set into the wall (and difficult to see) is a small, square opening. This is where you place the cairn key.

As indicated on the blackboard in the library, this key hole is in line with three obelisks, but that's not much of a clue! The first obelisk is nearby, the second is on top of the rocky hill and the third is way over the hill in an open area beyond the next wall that you can't get into...

Place the cairn key into the hole in the wall, roll and draw a decent weapon. Three burly Scotsmen will emerge and try to do away with poor Lara. When they're taken care of, return through the gap in the wall to the radioactive stream and continue to the top of the steps. A Scotsman will rush at you as you near the top, but short burst of MP5 fire will stop him in his tracks.

Jump the stream to land in the alcove at the very top and then climb over the low wall straight ahead. The helicopter will arrive but the pilot is a patient fellow, so let him wait and crawl through the crawlspace on your right. Kill another Scotsman and pick up two sets of Uzi clips and a large medikit. Crawl out the way you cam and climb back over the low wall.

Go through the doorway on the right (opened by the cairn key) to a vantage point overlooking the dry castle moat. The chimes for Secret #3 will sound. Hop down to either of the ledges with flagpoles and safety drop to the ground. Turn around and exit through the doorway on the left, where there are some Uzi clips.

Continue on through a patch of low lying mist and take out another marauding Scotsmen. Continue on and two more Scots warriors will take up the Lara challenge. Beyond them you'll see a megalithic stone structure over to the left. Climb onto the ledges below this and pick up your trusty Uzis and a set of Uzi clips. Turn around quickly because the two more of the Scottish warrior clan will sneak up behind you when you're back's turned!