One of the most underrated musical scores in the entire history of DC media is the dark, grungy, house music inspired soundtrack of The Adventures of Batman & Robin, a video game based loosely on the latter-day episodes of Batman: The Animated Series. Paired with incredibly trippy visuals, particularly in the Mad Hatter sequences, the TABR video game soundtrack provides the perfect spooky atmosphere for your DC Halloween.
You can listen to the soundtrack here, and watch the best part of the game in action (the boss fight against Mad Hatter) here.