1) Go from starting point to the upstairs where the Skull key lays. Check out the bookshelf. Contains: Basic Armor

2) After getting the key, walk back to starting room. Between two Jacob's Ladders a niche will open when you step on the area before the door. Contains: Doctor's Bag

3) When you begin to go up the stairs leading to the Brain Storage, you'll notice that a wall beside a secret door is marked with Blood. Contains: Voodoo Doll

4) Just before the Brain Storage (NO ZOMBIES ALLOWED!), you'll hear creaking somewhere down below. Look down from the edge and you'll notice a niche just closing. Go back to the stairs and run up to peek again. It is in the wooden support pillar. Contains: Cloak of Invisibility

5) At the great hall with table an electric thing, there's a shootable face (button) up there. Go to the doorway and step toward the table so you notice it. Shoot it and the lift goes down at the next corridor. Contains: Life Leech, Trapped Soul, Life Seed

1) Push the lever in the spider cellar, it will open the secret niche. You'll find your prize when you go back upstairs and open the locked door. Contains: Life Seed

2) Also in spider cellar there's a different wall section just left from the gate. Push it and it will slide back. Contains: Doctor's Bag

3) There's a pool where gargoyles hover over it. Dive in pool, and you'll notice a niche around the pillar. Contains: Diving Suit, Super Armor

Note: To find the Skull key, you'll need to kill one of the civilians.

1) In the high room with rising stairs there's a rectangular pool. Usually monks drop right there from upstairs. Throw a few remote detonator on the pool, push the detonator button, and dive in. Contains: Life Seed

2) This one's directly below the water tower, dive down and you won't miss it. There's a napalm launcher, if you continue swimming to the hole. Contains: Basic Armor

1) After you make your way out of the first building, zombies rush to attack you from some invisible place at the left. You'll find an illusionary wall just next to the shed. Contains: Voodoo Doll

2) There's a gathering of monks and civilians on the large hall with fireplace. After clearing the hall, take care of the one crouching at the smaller room with TNT bundles, and find the spray cans. Opposite the smaller room's window is a wooden wall, which seems to be a good place for a lift. Try searching near spray cans. Contains: 2 x Tesla Charges, 2 x Proximity Detonator, Box of Shells, Super Armor

3) There's a bridge with a ghost. At the left side of the bridge is a hidden niche. You must stand on a river to find it. Contains: Guns Akimbo

4) There's a house full of spiders and creeping hands. Between two doors is a lantern. Push the wall under it to reveal a niche. Contains: Life Seed

5) From the outhouse you drop below. In the sewers you'll find an area restricted by bars. Try the napalm launcher on the bars. Contains: 2 x Trapped Soul

6) Secret Level: When you reach the exit, make your way through the spiders and blow up the secret wall located on the right. Contains: Exit to Secret Level

1) There's a differently colored cash register which opens up a secret niche in a small wooden room. Contains: Cloak of Invisibility

2) There's a crack on a wall in room near the escalators. You can also get there by dropping in the hole located upstairs in piperoom. Contains: Life Seed

3) From the same room from another secret (dropping from pipe room leads there), there is a light marking something. To access it, you must destroy all the muzak speakers. There are 4 of them in the level. Contains: Guns Akimbo

4) Near fake exit, there's a fan and some free space after it. You can use Boots of Jumping to get in if you have trouble. Contains: Super Armor

5) In the ventilation shaft leading to the storage room near exit there's a ventilation grate in the ceiling. Contains: Doctor's Bag

1) There's a pillar with a Voodoo Doll. Grab the doll and turn around. You should see a ledge which is reachable with a well aimed jump. Contains: Boots of Jumping

2) There's a Super Armor at the top of a pillar, which you should have noticed. Jump on it from level above. Contains: Super Armor

3) Just before the last bridge leading to the tower, turn around and take a peek at what is down there. Somewhere below is a hidden path going inside the tunnel. Contains: Doctor's Bag, 2 x Gasoline Can, Box of Shells

4) When you find the path described above, continue in all the way up, do not enter the teleport. There is a differently colored cave wall. Contains: A way to a secret passage

5) Before the double doors at the top, there is a ledge to the right. Jump right below it. Contains: Life Seed

1) The great chasm and stairway leading downwards. After killing the monks, you'll notice grotesque gargoyle statues on the platform on either sides of stairway. Shoot them into the chasm. Jump where gargoyle statue was and you'll notice a reachable level nearby. Contains: Doctor's Bag, Box of Shells, Basic Armor

1) There's two raising and lowering platforms at another lung. You can jump on lower one and every second time you have a chance to get on the other. Contains: Box of Flares, Box of Shells

2) After making your way up from the slime, there's another niche with a button and creeping hands and another leading to the heart. Kill the creeping hands and go near the tunnel leading to the button. Look backwards and slightly upwards. In the middle wall there is a nearly invisible skull mark under the flesh. Shoot it. Contains: Super Armor

3) The heart is pounding. As you slip from the chamber to another, search for the niche on the middle pillar. Contains: Doctor's Bag

1) There's a shootable button over the throne. Contains: Guns Akimbo