If you start this level in the water then you've missed one of the sneakiest pick ups in the game so far. Tough luck! If you're hanging from the edge of the first slope below the bell tower you can drop to the next one and slide and leap forward to collect a box of shells from the opening. Then drop down and join the rest of us in the water below. Don't panic gang - it wasn't a Secret...

Climb out and start up the stairs. On the second third landing shoot out the grating in the long hallway, collect the Save Crystal and climb to the upper chamber. Watch your back as you gather goodies (flares shells and Uzi clips). Circle around to the little room in the middle of one wall and pull the box with the climbable surface. Drop down into the booking hall area, and defend yourself from the top of a ticket booth. When the coast is clear, look for an opening above another ticket booth.

Since you moved the box up above, you can jump up above the ticket booth and climb to a small room. Drop down the hole here, go along the passage and climb down into a ticket office. Take the maintenance room key and the large medikit, and exit via the door. Follow the right-hand set of escalators and run and jump the pit. If you slide off, grab the edge and shimmy to the right where you can climb up. Plug the gang member who's strolling along the platform with his unfriendly dog and have a good look around.

Try your key in the door at the far end of the platform. Pick up the Uzi clips and small medikit and push the button in the small room to turn on the lights. Look on the other end of the platform and now it's light, you should find an old penny. Head back towards the escalators and drop down onto the deep set of tracks. Sprint into the tunnel along the right hand wall and duck off to the right to avoid the oncoming train.

Clean up the bad guys in the red box room, collect the small medikit and Save Crystal and finish off the angry dog that turns up. Now have a breather and a look around. You'll see a lot of this room in the near future, so avoid pressing the switch you may come across. Instead, from near where you found the Save Crystal, jump across to the stack of boxes near the slope. Jump from the highest one and grab the vertical grating. Climb up.

Backflip from the top to land on the nearby ledge. Kill a thug who's hiding nearby and take his small medikit. Jump across to the platform jutting out from the wall and then make a tricky running jump to the just exposed corner of a ledge behind the rating you climbed up. The risk is worth it - here are your beloved Uzis!

Safety drop to the floor and climb back to where you killed the third thug. Jump forward to grab the gratings on the ceiling. Monkey swing along and make a right turn to get over a railing and drop down at the wall.

Slide down the little slope and climb into the doorway. For fun, practice your backflip with mid air twist move to land on a ledge behind you (you never know when it'll come in handy...). Pick up the rocket and return to the doorway. In front of you is a deep drill hole. Above you is a very big drill bit. You just know that it isn't going to stay there...

Slide backwards into the drill hole and hang and drop into the drill room. Jump immediately to the left as the collapsible platform disappears. Slide, jump and grab the crevice. Quickly shimmy to the right as the drill descends. Drop from the right half of the crevice onto more collapsible tiles. Fall through them onto a slope. Grab the edge as you slide off. Pull up and backflip with a mid air twist (see?) to another slope. If you didn't make the twist, give up now.

Slide off and grab the edge, then drop and grab twice down to Secret #1. Now that's a Secret - a Save Crystal and MP5 clips. Head down the wooden slopes to pick up the large medikit at the bottom of the hole, then return to the concrete tiled section. Climb into a brick lined chimney and climb up it to the dangerous ledge. It doesn't look safe, but you can climb onto the ledge without catching fire.

Sidestep right. Wait for the flames to die off, and jump atop the grey block to extinguish them properly. Climb again and pick up a small medikit. Climb upward and pick up Uzi ammo. A Switch behind you activates another nearby trap, and opens a trapdoor back in the red room. It now looks very dangerous to continue climbing up the grating - perhaps it's possible to take a running jump slightly to the left of it and land on the ledge you can just about see on the other side of the chimney...

Climb to the chamber above the train platform. Shoot the rat and collect the shells and large medikit. Drop down to the platform. Backtrack to the red room via the low set of tracks. Climb to the newly open trap door the way you did before. Climb through and grab the shells near the trapdoor. In the upper room, shoot the bad guy and check out the area. London Tube travellers will realise that we are now at street level.

Pick up the MP5 clips lying around and then go into the middle room. Drop through the collapsible floor tile and pull the box to access a hallway. Follow the passage to a greenish corridor. One way leads back to the room you were just in. The other leads to a network of passages ending in a room with a shallow pool and three doors. A sign here identifies it as 'Chancery Lane Safe Deposit'.

Down the corridor a little way is an alcove with two switches. The switches control the timed doors in the safe deposit room. You only need to press one at a time. The object is to raise the piece of ceiling that prevents you from swinging over to the platform in the room on the left. Pressing the right button allows you to sprint to the middle and far right rooms. It's best if you briefly sprint on the straights and slow down for the corners.

Press the right hand switch and make for the far right safe door. Once inside, press the button to lower a trapdoor in the middle room. Slide down the ramps and follow the passage back to the switches, picking up some flares on the way.

Press the right button again and head for the middle door. Climb through the trapdoor and press the button to open another trapdoor in the left room. Follow the hallway and drop down near the buttons again.

It's time for the left hand button. Sprint into the left hand safe and use the ceiling gratings to cross over the pool. Drop and grab the ledge, pull up into the alcove and get some shotgun shells, a Save Crystal and the first Solomon's key. Dive into the pool and follow the underwater tunnel to emerge back in the booking hall. Kill a thug who tries to surprise you and then go down the right hand escalators again and return to the red box room.

Monkey swing to the drill room. There's a second Solomon's key in the hall up from the drill (which you can now walk across). Follow the passage and return to the platform. Jump across from the mud to the escalators and run up to the booking hall. On your way past the ticket booths, use the old penny at the dark window. A ticket appears at your feet.

Check down the left hand escalators and take out the bad guy. Blast open the grating near the mudslide, and drop inside to gather the shells. That was Secret #2. Head for the platform and go up the stairs at the end to take out an angry dog. Back on the platform, shoot the two rats on the tracks and then run down the tracks to the right and shoot the guard quickly when he appears near the doors.

Press the switch in the middle door to open the other two. The one nearest the platform has a Save Crystal in it and the third one has a pool to swim through and a switch beyond. Prepare for a maze. Press the switch to gain entrance and then take two right turns. Press the switch here and turn around. Go left and then right down a long corridor. Press the switch just to the left of the corner and don't press the one at the very end. Retrace your steps to a door on the right and enter.

There are two switches here and a dark area opposite which contains a small medikit. Face the switches and press the one on the left. Turn around and exit this room through the door opposite. Cross the corridor and tun right. You've already pressed this button but hit it again anyway. Turn around and walk through the new door opposite. Go right and then left into a darker area.

Lighting a flare reveals a small medikit in an alcove to the right. Pick it up, turn around and walk to the wall and then right and right again for MP5 clips. Pick them up and turn around. Head right and then left past a lit candle and round the final corner to the Masonic Temple.

Have a look around and watch out for collapsing tiles underfoot. Notice that one of the curtains in the corner extends to the ground above a collapsible floor section. Run through the curtain and take the ornate star. Put both of Solomon's keys in the Mason's Room locks (diagonally opposite the curtain). Be ready for dog trouble when you take the masonic mallet from the room at the end.

Pick up the Save Crystal and Uzi clips from the middle of the room and then exit through the other door that opened when you unlocked the mallet room. Before going for a swim pick up the flares and small medikit and you'll probably want a flare lit in the underwater passage.

Swim to the chamber and climb out. Climb onto the large concrete block. Run and jump to grab the crack in the wall, and shimmy right (crawl in to get around the railing). Climb up another concrete block and jump for the grating on the ceiling. Monkey swing and drop to the crawlspace. Crawl in and through and take out a couple of rats on the other side. Use the ticket at the barrier and go through and up the stairs.

Take out the bad guy lurking behind a box and then use the ornate star in front of the door past the row of barriers. Be ready to jump back and open fire. Secret #3. Climb up into the roof void and follow the dark passage to a Save Crystal. Exit through the door to find yourself in the other passage off the pool room. Return to the ornate star room the same way as before.

This time, head down the escalator and use the masonic mallet to open the locked door. Enter and, before you push the button, find the crawlspace and Secret #4 - rockets. Now push the button and exit. Drop into the passage to the left and follow it, ready for an ambush from the right. That's a backtrack route in a few moments, but not yet. Pick up the bad guy's small medikit and continue, jumping the little hole in the path and taking out another dog.

Near the train, snuff the bad guy and collect the goodies (Save Crystal, small medikit, shells, large medikit, flares). If you can't find them, check the mud filled tunnel and the roof of the train! Backtrack to the crack in the floor, and follow the passage to climb into the train.

Press the button, and exit with a new area accessible. Keep your finger off the trigger as you enter the dark hallway. You have to let the badguy up ahead live, at least temporarily. He'll go around the corner and open a door to meet a friend. In the meantime, pick up a small medikit from one of the dark alcoves on the right. Then follow the torch-bearer down the hallway.

Be ready for an attack as you round the final corner: Two badguys rush at you. When the coast is clear jump across into the small room, pick up the rockets and press both switches. Now you need to backtrack past the alcoves (where a candle has lit) and head right at the end (instead of taking the crawlspace). Climb up a block and climb into the train. Press the button again and drop through the trapdoor.

At the hole in the corridor head away from the platform and take a left across an enclosed bridge. If you're lucky a tube train will rattle through the station below you. Go down the ramp to the platform area and drop into the deep set of tracks. Return to the red box room. Again! Climb through the trapdoor and climb again into the higher area with the roll down doors. Enter the room to the right. It's Secret #5 - rockets, MP5 clips, desert eagle clips, a large medikit and...a bad guy! Take him out and press the button here.