This game seems like it would be made specifically for me. I enjoy: first person shooters, metal music (including many of the featured artists), and rhythm games. But I just don't think the mechanics make for interesting gameplay, and the novelty of it wears off very quickly. Add to that the 100% linear levels, with the same "doors close, kill all enemies to proceed" progression over and over, minimal variance in enemies and literally the same boss for 99% of the game, and it falls flat.

Fun on the lower difficulty setting to avoid frustration. For a game that relies heavily on its soundtrack, it was hit-and-miss for me. Music was good, vocals not my taste mostly, which is irionic considering them kicking in is sort of the reward.