Some confusion arose while tagging this question. The game in question was called "Dune: The Battle for Arrakis" on Genesis/Mega drive, "Dune II: Battle for Arrakis" on PC in Europe, and purportedly "Dune II: The Building of a Dynasty" on PC elsewhere*. We already have a dune2 tag, and a well meaning community member created a dune-the-battle-for-arrakis tag. Can we get the new tag made into a synonym for the old, please?
* anecdotally, I verified that I have Dune II: Battle for Arrakis in the Chicago suburbs, and my father impulse bought the game because he's a fan of the books. I can't imagine he wandered into a game import shop in the early '90s on a whim.