Hellboy: The Board Game – In Mexico is an expansion that adds gameplay elements from the "Hellboy in Mexico" storyline to Hellboy: The Board Game. This expansion consists of:
- 4 hero miniatures (Luchador Hellboy & 3 Luchadors)
- 1 boss miniature (Camazotz)
- 15 minion miniatures (5 types)
- 4 agent cards
- Case file deck
- Encounter deck
- Requisition deck
- Deck of doom!
- Enemy deck
- Game tiles