Arkham Horror: The Card Game · Expansion

Arkham Horror: The Card Game – The Scarlet Keys Investigator Expansion

Worth it

Our take
Community picks rate its customizable upgrade cards highly, though BGG/Reddit replies note the box is more complex and better after a simpler box.
What you need first
Just the base game
What it adds
6 investigators (Carson Sinclair, Vincent Lee, Kymani Jones, Amina Zidane, Darrell Simmons and Charlie Kane) plus the full set of player cards and deckbuilding options for the The Scarlet Keys cycle.
What it fixes
Core-set card pool is thin; adds many more deckbuilding choices and investigators for any campaign.

Sources

Last checked 2026-10-08. Spot a mistake? Tell us.