Level 1
Termination Central

Level 2
The Vaults of Zin

Level 3
The Tomb of Terror

Level 4
Satan's Dark Delight

Level 5
Wind Tunnels

Level 6
Chambers of Torment

Secret Level
The Haunted Halls

Through much of the Wind Tunnels, you’ll find yourself being hurled through the air. Filled with large air tubes that suck you in and toss you around, the level can get a tad confusing, though it’s made up of only three main areas that you return to repeatedly. Just remember to hit all the Q buttons you encounter, and the path through the Tunnels will be obvious.

In the corridor beyond the first wind tunnel, you'll come to this small hole in the floor. Dropping into it will take you to the first secret area of the level

Follow the underwater passageways beyond the second wind tunnel to find a small secret alcove

Secret Area 1
After traveling through the first of the three central tunnels, look around to see some death knights on a platform filled with items. Walk into the hallway leading out of the room. At the second turn in the corridor, there is an opening in the corner of the floor. Drop into the hole to find a teleporter. This will take you to the death knights’ platform, which has some ammo, health, and a Quad damage.

From Secret Area 1, you can jump on the tiny ledge which goes around the perimeter. Walk around to get a box of rockets from a small alcove on the far side.

Careful mid-flight planning will allow you to access this roof-top area and a Quad Damage

After defeating the Shambler, shoot this Q button to access a very useful biosuit

Secret Area 2
From the second central wind tunnel, jump up on the ledge and drop into the moat surrounding the room. Swim under the walkway into the next room, then through the archway on the far wall. This will lead you to the second secret area with a rocket launcher, some nails, and some health.

After you leave the second area through the exit tunnel, you’ll have access to a wind tunnel that had previously been sealed. Jump up into this tunnel, which will take you up and over, across a large open area toward another tunnel. As you begin sailing horizontally through the first tube, move perpendicular to the direction you are being pulled. The idea is to avoid making it into the second tube. If you pull it off, you will land on a rooftop area with some ogres and a Quad Damage. From here, you can drop down into the nail trap room (your original destination), and wreak havoc more effectively - especially against the shambler lurking around the corner.

The final secret area lies just before the exit

Secret Area 3
After fighting the shambler, walk to the far side of the pit and look up. There is a Q button on an overhead beam. Shoot the button to open an area containing a very useful biosuit.

Secret Area 4
The third central wind tunnel will take you to the exit Slipgate. Before exiting, look down and shoot the floor. An area will open with some health and ammo, and a teleporter that will take you back to the central room.