TEXT: Roll “Dungeonmorph”
  Notes
   1 
                 or 
  Stairs up or Exit 
  ( player choice 
  or roll, roll  1D6 
  1-3=Stairs,
  4-6=Exit)
   2
                  
                  or
  Stairs down or 
  Exit (player 
  choice or roll, 
  roll 1D6 
  1-3 = Stairs 
  4-6=Exit)
   3
    
                  or
  Straight 
  Hallway* 
  w/Covered pit or 
  other trap (roll 
  1d6,
  1-3 pit trap,
  4-6 other ) 
  Roll “Dungeonmorph”
  Notes
   4
  Straight hallway 
  *
   5
  4- way 
  intersection*
   6 
  Turn right*
   7
  Turn left*
  8
  T-intersection*
  Roll “Dungeonmorph” Notes
  9
  Empty 
  room. 
  **
  10
  Trapped 
  room**
  11
  Monster 
  Room**
  12
  Dead 
  end or 
  Re-roll.
  E
  You hold in your hands a simple random 
  dungeon generator. Does the world need 
  another one? Probably not, but here it is 
  anyway!
   
  You'll Need: d12, d10, d6, d4. Graph paper 
  and pen/pencil or electronic equivalents.
   
  Instructions: Draw the starting point 
  ( room, hallway, whatever you like), roll 
  d12. Check the table, add what's shown to 
  your map, repeat.
   
  On Secret Doors: When corridors (or 
  rooms) abut without means of passing 
  between them, check for secret door: Roll 
  1d6, 1=Secret door. Roll again:1 – One 
  way, direction you're going, 2-5 Both 
  directions 6 – One way, against your 
  direction.
   
  On Stairways/Exits: Don't resist multiple 
  stairways or exits! They give players 
  choices!
  *On Hallways/Intersections/Turns
   length = 1d10 squares 
  ** On Creating rooms:
  Roll 1d4-1 additional exits.
  Dimensions: 1d10 by 1d10 squares
  EXIT
  EXIT
  No Budget No Frills 
  Pencil and Paper 
  Dungeon Generator
  Ver. 3.0
  By John Yorio, 2012
  Creative Commons Attribution-
  NonCommercial-ShareAlike 3.0 
  Unported License
  Actual result of using previous table. 
  Excited yet?
  I've 
  intentionally 
  left 
  the 
  dungeon 
  unpopulated, beyond the indication of traps 
  (T), empty rooms (E) and rooms with 
  monsters (M). I am sure you can come up 
  with something suitable if you want to use 
  the sample. 
  If you give the generator a try please let me 
  know what you think. You can drop me a 
  line at:
   tabletopdiversions.blogspot.com
  Happy Dungeoneering!
  -john
  M
  T
  
SOURCE: textdata/thevault/System neutral/Tables & Charts/Dungeons & Exploration/Dungeon Generators/D12 Dungeon Generator.pdf