This game might as well be the definition of underrated. On release, IGN gave this a 2.5/10, and various other critics awarded it oddly low scores. Is Operation Darkness excellent? Not at all, but it has a lot of great ideas and a fair amount of decent stages. Music and voice acting are also pretty good. I honestly think a lot of the negativity stems from the demo stage being one of the worst looking and least interesting in the entire game. This is a game worth checking out - wouldn't necessarily call it a gem but it's like a cool rock or something.