Pick your expansions and Ancient One below for exact setup steps — side boards, special decks and preludes included — plus a full rules reference with official errata applied, and a searchable index of every rulebook and the Ultimate FAQ. The Doom track is already counting.
The Investigation
Select the sets on the table. Every step and ruling below adapts to your choices.
Setup
Follow the steps in order. Each cites its official source; errata and FAQ rulings (Ultimate FAQ 2.0, Jan 2024) take precedence and are already applied.
Components
Every component the rulebooks list for the sets you’ve selected, with its count. Tap a picture to enlarge it. Forsaken Lore, Strange Remnants, Signs of Carcosa and Cities in Ruin list theirs as text, so most of their items have no picture.
Rules Reference
Tap a heading to open it. Contents adapt to your sets and Ancient One.
Search the Rulebooks
Answers from this page come first, then every matching page of the base rulebook, every selected expansion, and the Ultimate FAQ.