I've been working this well before the jam, but decided to finish it up when I saw this jam published. This ruleset hits Nightmare Mode in all four areas:
- It doesn't use any tables, ordered lists, or unordered lists
- There is no expository or narrative writing
- This is an all-new ruleset that does not rely on any other supplement or SRD
- It is less than 1,000 words (960 total)