I'm starting a project of compiling a list of all the BECMI/Mystara products which mention Blackmoor. Posting only a few to begin with. Others are very welcome to help out:

MODULES
DA1 Blackmoor Module
DA2 Blackmoor Module
DA3 Blackmoor Module
DA4 Blackmoor Module

BOXED SETS
Hollow World Boxed Set: History section, Blackmoor Era Planetary Map
Wrath of the Immortals

GAZETTEERS
Gaz1 - Grand Duchy of Karameikos: Timeline mentions destruction of Blackmoor 3000 years earlier.
Gaz2 - Emirates of Ylaruam: Timeline revision, Blackmoor destruction moved back another 1000 years.
Gaz3 - Principalities of Glantri: Connections to the FSS Beagle, Drachenfels family of Blackmoorian ancestry etc.
Gaz 10 - Orcs of Thar: Origins of the Humanoid races linked to the Blackmor Era.
Gaz 13 - The Shadowelves: Rafiel, Blackmoor Artifacts etc.

I imagine the list will at the end consist of virtually every Mystara product, so a few notes about what to expect from each module might be worthwhile.


-Havard

Since Finarvyn asked me about this in another thread, I will try to expand on the list of gazetteers relevant for Blackmoor. Pretty much every single Gazetteer mentions Blackmoor, but some go into more detail than others.

-Havard

Gaz 3 also includes an adventure outline where the PCs go back in time to Blackmoor and destroy the City of the Gods, and discusses what consequences this would have on Mystara.