I have been doing this for twelve years now. Writing against RPG-a-Day. Against. Again and again. Every day, every August, since 2015. Most often on my own, sometimes collaboratively with others here on d6ideas or across different (German) blogs.
2015: ArtifactaDay
2016: Loot-a-Day
2017: Rival-a-Day
2018: Ad-Blog
2019: RPG+Ally+a+Day
2020: Not One Step Back
2021: Veteran-a-Day
2022: The Thousand Titles of the Cat Emperor
2023: Sommerverdichtung (German only)
2024: CampaignConceptaDay
2025: A-Piece-of-History-Every-Day / Calculating World(s)history
And now? The German next door neighbours at Kritischer Fehlschlag have issued the rallying cry “Crime Scene” (German).
But here? After twelve years of doing this dirty work? There is but one possible answer:
The Dirty Dozen.
Interpreted via the lense of the so called Dirty Dozen of persistent organic pollutants such as DDT and dioxins (although an earlier thought was the likewise so called Dirty Dozen of biological weapons and this might still colour some of the entries).
One-hundred-and-fourty-four poisons and pollutants (in the widest, freest sense). Twelve each for twelve systems. Thirty-one days. Twelve years. Against RPG-a-Day. Again.
Easy. Even though – apart from the format and that only in the context of this series – nothing new.
Encounter bag with twelve manifestations of environmental pollution from the Monstropoetikon. The bag contains six marbles (one each of red, green, blue, white, black, gold), draw three times with putting back the marble after each draw:
| 1st Marble | 2nd Marble | 3rd Marble | Monostichonmonster |
| black | red | red, blue, gold |
The Red Sign |
| black | red | green, white, Black |
The Pain Wave |
| black | green | red, white, Black |
The Wire Thicket |
| black | green | green, blue, gold |
The Life |
| black | blue | blue, white, black |
The Arcane Exsudation |
| black | blue | red, green, gold |
The Alien |
| black | white | white, black, gold |
The Ash Flake |
| black | white | red, green, blue |
The Quicksilver |
| black | black | blue, white, black |
The Star Plague |
| black | black | red, green, gold |
The Fragment |
| black | gold | red, white, gold |
The Atomic Fire |
| black | gold | green, blue, black |
The Chaos |
If the first marble is not black, there is no encounter.