In OD&D, Gygax lays out his procedure for randomly stocking a dungeon in "Section 8: Referee Information," beginning on page 68 (Single Volume Edition from 2011).
- "Thoughtfully place several of the most important treasures, with or without monstrous guardians."
- Roll 1d6 for each remaining room: 1-2 indicates a monster.
- Roll 1d6 for all rooms again: 1-3 on "those rooms or spaces with monsters in them indicates some form of treasure is present." A 1 on a "room or space which is unoccupied indicates that there is some form of treasure there."
My Dungeon Stocking Die
|I love this d12 I have from Chessex.|
And here are the percentages: