Level 1: Boat Docks
Jump out of the boat onto the dock. Follow the dock up the moutain pass, and follow it across the wooden bridge. As you'll enter the area, the path will branch off. In front of you is the Skull key door, and to your right another path. Follow it along (there are numerous small areas with supplies), and you'll eventually find another wooden bridge. Cross it, and grab the Skull key. Return to the Skull key door and enter it. To the left side of the room is a staircase. Follow it up into the cabin. Enter the door at the top of the stairs, and follow the hall to the end. Before you is the Dagger key door. Turn to your right, and you'll see another wooden door. Enter it, and turn the switch to your right. Quickly turn around, walk out of the bathroom, and enter the kitchen to your left. There is now a door open next to a wooden steering wheel. If it closes before you can enter it, go back and turn the switch in the bathroom again. Go up the steps, and go toward the left side of the room. This causes the wall on the right side of the room to crack open, revealing some zombies and the Dagger key. Grab the Dagger key, and you'll hear a door open.

Turn around, and you'll see a passage over to your right, where a door has just opened revealing a switch. Turn the switch and return to the Dagger key door. Go through the Dagger key door, and turn to your left. You'll see a cave in the rock face. Enter it, and you'll find two passages. The one to your left leads to the Moon key door, so take note of it, and head down the right path. Go down the stairs and into the area with the lighthouse. On the other side of the lighthouse, the cellar doors have been removed, and you can enter it here. As you enter the lighthouse, you'll see a locked wooden door to your left, and some steps to your right. Remember this door, as we'll come back to it in just a few moments. Climb the stairs to the top.

 You'll come to an area with a hole in the roof and a wooden barrel. Jump up on the barrel, and up through the hole onto the top of the lighthouse. Walk around the lighthouse, and hit the switch. Now go back down to the door I told you to remember. It's now open, and you can go in and grab the Moon key. Jump back out of the lighthouse the way you came in, and backtrack to the passage leading to the Moon key door. Go through the Moon key door, and turn to your left. Follow the path along and enter the cave to your right. Walk along, and you'll see a hole in the floor. Jump down, and turn the switch to the right of the door. Now go through the open doors, and turn to your right. Follow that path along, and enter the cave to your right. Push the symbol to end the level.
Level 2: Old Opera House
Follow the path and go through the iron gate. To your left, you'll see the Old Opera House. Enter it, and go up the stairs to your right. Walk to the end of the hall, and enter the box seating to your left. Pick up the Moon key, and return to the street. Turn to your left, and follow the street down to the alley. Walk to the end of the alley, and enter the doorway to your left. Go down the stairs, and through the Moon key door. Go all the way forward and turn to your left. Go up the stairs, and turn to your left. Just to the left of the lever is the entrance to the stage. Walk onto the stage, and jump into the hole on the floor (note: you can also get down to this area by going in the room to the right of the lever, up the elevator, across the catwalk, and down another elevator). Grab the Spider key, and go through the Spider key door.

To your right is the Dagger key door, and there's a wooden door to your left. Enter the wooden door, and kill the Cultists to collect the Dagger key. Now, go through the Dagger key door. Go forward, and jump into the water. Turn around, and you'll see an underwater passage. Enter it, and drop down to the bottom of the next room. To your right, you'll find the Fire key. Grab it, and return to where you first jumped into the water. Go through the tunnel to your left, turn the corner, and swim until you're blocked by the bars. Dive down, and take the underwater passage to your left. Surface in the next room, and jump out of the water. Go up the spiral staircase, through the Fire key door, and push the symbol to end the level
Level 3: Gothic Library
Go up the steps, and into the library. Keep going forward, past the circular room (take note of the Eye key door here), until you reach the Moon key door. Turn to your right, and walk around the corner. You'll see a wooden door in front of you, and there's a button to open it on the bookshelves on the right side of the room. Hit the button, and go through the now-opened door. In the middle of the stacks you'll find the Eye key, collect it, and push the button next to the door to get back out this room. Return to the circular room, and go through the Eye key door.

 To your right, you'll see an over-turned bookshelf. Go to the other side of it, and crouch down. You'll see a button on the over-turned bookshelf which opens the bookshelves to your left. Push it, enter the room, grab the fire key, and push the button to get back out the way you came in. Return to the circular room, and walk toward the entrance of the library. To your left, you'll see a staircase leading up to the second floor. Go up stairs, and enter the Fire key door. Take the stairs up, and as you enter the stacks on the upper floor, immediately turn to your left. Walk forward, go around the corner, and you'll see a button on the bookcase to your right. Push it, and a bookcase will open up before you. Go in, grab the Moon key, and push the button to get back out. Go back down to the first floor, past the circular room, and through the Moon key door. Go forward, around the corner, and push the symbol to end the level.
Level 4: Lost Monastery
Follow the path into the "Holy Order of Carpathia," and go down the stairs. When you get to the Fire key door, turn right. There's some steps leading down to the Moon key door, and a path just to the right of the steps. Follow the path, go up the staircase, and follow the hall until you get outside. Once outside, you'll see a staircase over to your left (take note of this for later), and some steps leading down in front of you. Go down the steps, and enter the building through the passage to your left. Go down some steps, through a wooden door, and hit the switch you find in the room. Now go back to stairs I pointed out a moment ago, go up them, grab the Moon key, and jump down through the hole in the floor.

 You're now back in the room with the Moon key door, go through it, and you'll soon find yourself back outside in front of a small churcher. Enter the church, and go up the staircase on your left. When you get upstairs, jump through one of the windows, turn to your right, and follow the roof around the corner. You'll find window into another room, so jump in, and go down the stairs. Pick up the Fire key, and retrace your steps to the Fire key door. Go through the Fire key door, and enter the cave over to your left. Enter the cave, and after a long trek (across a few wooden bridges), you'll come back outside in an area outdoor area with a bell tower. On the other side of the bell tower is a well. Jump into it, sink all the way to the bottom, and follow the underwater passage to the next area. Surface, and jump up onto the ledge.

You'll see a small stream going into the rockface. Jump in, and go with the flow. After you drop down a couple of waterfalls, you'll find yourself in the area where the Eye key is. Jump up, grab the Eye key, and jump back in the water and go with the flow again. Eventually, you'll go over a waterfall and find yourself in still water. From here you should see two paths. Take the one of the left (you'll have to jump up a little to get into it), and follow it back down to the bell tower. Go up the stairs of the bell tower, through the Eye key door, up some more stairs, and ring the bell. Now go back outside, and you'll find the stone archways. Go through the archway, around the corner, and hit the switch to end the level.
Level 5: Steamboat
Turn to the right, follow the deck around, and go up the metal stairs. At the top of the stairs, turn around, and go to the front of the ship. Turn to your left, go halfway down the hall, and enter the passage on your right. Just beyond the metal doors in front of your is the Skull key door (make note of it for later). Turn to your left, and enter the room on the left side of the hall. Grab the Spider key, and retrace your steps back to the metal staircase.

After going down the steps, turn around, and go to the rear of the boat. You'll find the "Rotting and Lifeless Members Louge," so use the Spider key door, and enter it. Inside you'll find two metal doors, and one wooden door. Enter the wooden door, find the lever, hit it, and walk back out of the room. One of the metal doors will now be open, so enter it, and follow the steps down into the boiler room. If you go over to your left, you'll find a "Exit" sign (take note of this for later). Instead, you want to go down the small tunnel with a metal door at the end (this is to your right as you enter the boiler room). Enter it, grab the Skull key door, and retrace your steps to Skull key door (it's located behind the metal doors near where you found the Spider key). Go through the Skull key door, and you'll see a metal panel to your right.

Open it, and you'll see a lever marked "Exit." Pull it, and return the boiler room. You'll now find the door next to the "Exit" sign is open. Go through it, enter the room on your right, pull the lever next to the "Danger" sign, and a door will open up in the room behind you. Enter it, and push the symbol to end the level.
Level 6: Graveyard
Go forward, and up the steps. Follow the walkway, but do not enter the next area of the graveyard (take note of the Skull key door on the tomb though). Instead, look to your right and you'll see a passage. Enter the passage, and follow the walkway all the way to a room with three posts. On one of the posts is a switch. Hit it, and the middle post will lower revealing the Skull key. Grab it, and retrace your steps, and enter Skull key door. After you go down the steps, you'll find yourself in what appears to be a dead end. But you'll notice that one of the tombs is blood stained. Push it, and a passage opens up behind it. Follow that path, and after you go through a wooden door, you'll come to a fork in the passage.

Down the left fork lies the Dagger key door (take note of it). Since you don't have the key, take the right fork. When you get to the room with hole in the floor jump in. Hit the switch, wait for the panel to lower, grab the Dagger key, and go up the stairs to the room you just jump down from. Now go back down the steps, and enter the Dagger key door. You'll soon find yourself in a room with the Fire key door, the Eye key door, and a wooden door. Go through the wooden door, and then through another wooden door, and you'll be in a room with a wooden staircase and a short hallway. Go up the stairs, through a couple of wooden doors, down the steps, and pull the lever. You'll see that a switch is now opened in the short hallway. Retrace your steps, go down the hallway, hit the switch, and through the door it opens. On the other side of this room are two staircases leading up, take either one of them, and push the hand on the wall at the top of the stairs. This opens up a switch behind you, hit it, and the Eye key is revealed. Quickly jump on the beam, cross it, and collect the Eye key. Now retrace your steps to the Eye key door. Go through the Eye key door, and you'll see a wooden door and a pool of water. Jump in the water.

Near the bottom on the right side, you'll find a switch. Hit it, and surface, and go through the now-opened door. Go down some steps, through another wooden door, and up the stairs. Drop down the hole, and look around. You'll find a wooden door with a lever next to (we'll use this later), and another wooden door. Enter the wooden door, go through the hole in the wall to your right, grab the Fire key, and return to the door with the lever next to it. Pull the lever, and go through the door. Now go through the door to your right, up the steps, and you'll find yourself next to the pool of water again. Just walk through the door, up the steps, and through the Fire key door. Follow the path along, across a bridge, through some doors, until you get to the room with the fireplace. To get to the secret level, jump into the fireplace, and follow the passage to the symbol to end the level. For completion sake, I'll include the regular exit. Go up the steps, hit the switch to raise some stairs, then climb the stairs, and follow the passage to the symbol to end the level.
Level 10: Boggy Creek
Just as the level begins, turn around, and jump out the boat. Walk along and you'll come to a cabin. Now find the boat next to it. Now, if you like, you can take advantage of a bug in the level. Get in the boat, and face front ot it. Now jump out, and walk to wall. If you jump up, and move back and forth along the wall, you'll eventually find the spot where you jump through it. Then, all you have to do is walk forward, and push the symbol to end the level. I recommend that you don't do this, and play the level correctly. Okay, we're back at the boat. Next to the boat, and across from the cabin is a small outhouse. Enter it, and grab the Spider key. Now if you head back toward where you jumped off the first boat, you'll find a fork in the creek. Take the left passage, and look for a spot on your left where you can jump up on dry land. Now follow this along until you get to a delapidated cabin. Enter the cabin, and find the Spider key door (it's on the first floor). Go through it and go down the stairs into the cellar.

After you enter the cellar, the door will close behind you. A bit of a problem. Now look around for the Skull key, but don't grab it yet. To the left of the key (this is facing it) is a column with a switch on the other side of it. Hit the switch to open the door. Now grab the key, and run back to the door to avoid fighting the Giant Spider. Now all you need to do is fight your way back to the first cabin. Behind the boat are a couple of columns. On one of them is a switch that requires the Skull key. Now that you have it, push the switch, and a section of the swamp will open up in front of you. Now all you need to do is wakk forward, and push the symbol to end the level.
Level 7: Mountain Pass
Go up the steps, and follow the path along until you get to the Skull key door. Turn to right, jump down, and enter through the doorway in front of you. Take the path to your left into the warehouse (remember the right fork for later). Find the forklift, and get in it. Push the panel, and the forklift will back up. Use the forklift to jump up into the room. Hit the switch, and a door will open up across the way. Jump back down into the forklift, push the panel; and when the forklift gets back to the other side of the room, use it to jump up into the newly opened door. Walk around the corner, until you find a switch. Hit the switch to open the lift's doors below you, now jump down, hit the lever to call the elevator up, and enter the elevator.

Hit the lever to ride it down. Follow the passage, up some stairs, and keep going until you find the teleporter. Enter it, and you'll be in a room with a crack in front of you. Grab the Eye key, and blow the crack. After the water finishes rising up, go up the steps, and into the Eye key door (it's on the left side). Jump across the chasm (better save first), and ride the lift up. Then jump across the gap in the wooden bridge, and make your way across the narrow ledge. Walk down the passage, open the stone door, and push the pillar in the next room to get the Skull key. Grab the Skull key and retrace your steps to the warehouse, and go back outside toward the Skull key door. You can't jump back up there, but if you remember the right fork I pointed out earlier, you can follow it to a teleporter that will take you to the Skull key door.

Go through it, and another stone door; then jump across the chasm, and then across a gap in a wooden bridge and you'll come to the Fire key door. To your right, you'll find a narrow ledge. Carefully, follow it around, grab the Fire key, and return with it to get through the Fire key door. Follow the path around, through a couple of doors, until you get to the room with a pillar in the middle of it. It also contains three teleporters, only one of which is open. Enter it, and use the moving pillar to get across the chasm, push the pillar on the other side; and return to the teleporter. Now, another teleporter is open (it directly in front of you). Enter it, and follow the ledge around to another pillar. Push it, and some bars will raise up, and you'll have to deal with a Giant Spider. After a little bit of time, the bars will raise. When you return to where you came in, you'll find that you're way is blocked.

Wait a little while (you might as well battle the Spider while you're waiting), and you'll be able to get back to the teleporter. When you get back, the third teleporter will be open (again, right in front of you). Enter it, then go down the steps, and push the pillar. Grab the Moon key, and battle the Hell hounds while you wait for the steps to rise back up. Enter the teleporter, and push the pillar. After the stairs descend, follow them down, and head outside. Walk around the structure, jump across the chasm, and step on the square. The structure will lower down, revealing another teleporter. Enter it, and go into the cave by the "Danger" sign. Jump into the water, and push the symbol to end the level.
Level 8: Abysmal Mine
Swim into the next area, and surface. Jump up on one of the boxes, and then jump up onto the higher area. Shoot the TNT barrel to blow the door open. Walk through, and blow up the TNT barrels to your right, to reveal some water. Jump in, grab the Fire key, and jump back out. Over toward your right, you'll find a wooden door. Go through it, across the bridge, and through the Fire key door. Go up the steps, and around the corner. You'll see the Skull key inside of a container. Push the panel across from it to open it.

Quickly jump in, grab the key, and jump out. If it closes back up before you get out, just use the conveyor belt in the room below you to get back up. Now retrace your steps through the Fire key door, and through the wooden door. Jump down into the passage before you, and to the right of the mining car, you'll find the Skull key door. Go through it, grab the Spider key (underneath this coffin is a Life Seed), and retrace your steps to the Fire key door. When you're standing on the wooden bridge, look down on the left side to see the Spider key door. Jump down, and go through it. Follow the passage along, through the waterfall, grab the Eye key and return to the Spider key door. Go through it, and use the waterfall on your right to jump back up. Go through the Fire key door, jump down into the room below, and go through the Eye key door. Jump into the second mining car, and push the symbol to end the level.
Level 9: Castle
Ride the mining car to the end of the corridor, then jump out and go through the door to your right. Follow the walkway until you enter a door into a room with a walkway surrounded by water. Follow it around, through another door, and go across the drawbridge into the castle. Take note of the Skull key door to your left, and take the passage to your right. Go down the stairs, and through the ornate door. In the next corridor, you'll find a locked ornate door, and a wooden door. Go through the wooden door, and enter the room to your right. At the end of this passage, you'll find three prison cells. Look in the third cell, push the switch, and return to the locked ornate door, which is now opened. Go down the steps, around the corner, over the stone bridge (take note of this for later), and up some more steps into a large room with pillars.

On the right side of this room, you'll find a room with a button. Push it, and return to the stone bridge. Turn to your left, and jump into the newly opened passage. Follow the passage along, grab the Skull key, then return to the Skull key door. Go through it, and take note of the Eye key door to your right. Follow the passage to your left, until you go through some wooden doors into a room filled with suits of armor. Walk forward to to the grandfather clock, turn right, go around the corner, and walk through the next two room. At the end of the Dining room (there's a wine bottle on the table you can pick up--doesn't do anything though), you'll find some stairs leading up to the second floor. Go up them and through the double doors to collect the Eye key (there's a Death Mask in the other room which might prove useful in obtaining the Eye key). Now retrace your steps to the Eye key door. Open the Eye key door, and enter the teleporter. Now walk along until you get to the giant door with the four buttons.

 To your right, you'll see a door with an ornate Gargoyle on it. Guess what you'll have to fight to get the key behind that door. Well, double your guess, and go in and grab the key. On the left side of the giant doors, you'll find an ornate door with a spider on it. Go in and grab the key (do it quickly, and you don't have to fight the Spider. Now push all four buttons, and enter into the swirling thing in the center of the room. You'll find yourself in front of a small barge. Get on it, and push the hand print to wait for it to take you to the temple in front of you.

When you get to the other side, jump out, enter the temple, and you'll find yourself facing not one, but two Cerberus's. There's a button in the room which will lower a Death Mask which will help you out, but it lowers really slowly. I found the best way to defeat them was to wait until they drop down into the pit below you, then move over the side and drop TNT on them. However you kill them, when you do, you'll collect two more keys, which will open the doors in this room. Push the symbol, and watch the cutscene. Truth be told, it's more of a slide show, but the music is pretty cool.