The correct pronunciation of Galaga emphasizes the second syllable (ga-LAG-a) for one simple reason - it was the direct successor to Galaxian (which was also pronounced with emphasis on the second syllable ga-LAX-i-an). He says everyone at Midway pronounced it that way from the time it was introduced on their channel sales call, and arcade operators did as well in order to keep related/similar games straight. However, he also mentioned that within a few years afterwards, the GAL-a-ga pronunciation became so popular among customers (for whatever reason) that most people started pronouncing it GAL-a-ga.
