Air Fortress

Q: What's the point of this game?
A: Each level is divided into two parts. In the first part, fly around, shoot
   enemies, and collect as many powerups as you can for the second part. In
   the second part, bop around the maze, find the nucleus, destroy it, and 
   find your airsled and escape before the fortress blows up. After you 
   complete the first eight fortresses, the game repeats them again.. the
   layouts are exactly the same, but the warp-tubes take you to different
   places. Hopefully you've drawn some maps; then things'll be easy. You get
   a proper ending after completing this second quest.

passwords:

First Quest:
2 --- I8TA
3 --- KA9I
4 --- 6KAI
5 --- 8NYU
6 --- 2APP
7 --- OS85
8 --- SUGA

Second Quest:
2 --- 11NA
3 --- 8AJI
4 --- TOBI
5 --- NDA4
6 --- MA1K
7 --- DOMO
8 --- 7NDA

Q: Gimme some directions for stage six.
A: From where you enter the fortress - 
   - move left, and find the elevator
   - go down the elevator to the small room with two metal hoppers
   - kill the hoppers and enter the elevator in the lower-right corner
   - ride the elevator to the bottom, and walk right until you find another
     elevator
   - go down one floor. follow the corridor to the left and as it curves
     back to the right. allll the way to the right you'll find a warp tube
     on the ceiling, as well as an elevator. the tube leads to your airsled.
   - take the elevator down to enter a long, vertical stretch.
   - fall to the bottom, where you'll find an elevator to the right
   - go down and follow the corridor as it goes left
   - walk left to find an elevator. ride it up and you'll enter another
     large vertical shaft. at the top are two warp tubes.
   - take the left tube and you're at the nucleus.


Q: Where the hell is the nucleus at stage 8?
A: .....
   - go down the first elevator and stop at the first floor
   - go left to find another down elevator
   - go down two floors and exit to the right to find a warptube
   - take the tube. you'll go to a corridor extending left
   - go left until you find a down elevator and a warptube on the ceiling
   - go down the elevator, and you'll enter a shaft.
   - fall all the way down and you'll see another elevator.
   - ride it down, and you'll see a corridor going right, and another 
     elevator.
   - ride up and exit to find a down elevator.
   - ride down one floor, and walk left to find an up elevator.
   - ride it to the top to find a warptube.
   - enter it to get to a long corridor going left.
   - walk left and kill the tank. ride the elevator down at the end of the
     corridor.
   - at an intersecting corridor, go left and you'll see a warptube in the
     ceiling.
   - enter the tube to get to another corridor.
   - go right and enter the warptube in the ceiling. you'll appear in a
     horizontally-divided corridor.
   - fly left along the ceiling and enter the next warptube. you'll appear
     in corridor going left.
   - walk left and enter the elevator at the end of the corridor.
   - ride it up to get to a vertical shaft.
   - fly to the top, to another elevator.
   - enter and ride the elevator. you'll exit to a corridor that goes both
     left and right.
   - walk right until you find a warptube in the ceiling.
   - enter the warp tube to get to another shaft. at the top is the nucleus.