Might and Magic: Book One - Secret of the Inner Sanctum

What is the secret of the Inner Sanctum?

That's something you'll just have to find out for yourself in this fantasy role-playing adventure. If you can, that is...

Go adventuring with 6 different characters. Cross oceans, climb mountains, search through castles, caverns, dungeons and more, all in 3-D color perspective. Master an elaborate combat system, with hundreds of special events, magic spells, and monsters (good and bad). In Might and Magic, Book I: Secret of the Inner Sanctum.

Source:

From the Triton Software Catalog For Your IBM, 1988