I don't really know why Deep Blue gets panned so much. It's just different than your typical shooter. The powerup and life system is different, unique. There's strategical merit in memorizing the patterns of the waves of enemies that assault you. Graphically it's great for a game released in 1989, all the sprites are just beautiful. The bosses are huge. It's tough, but I like challenging shooters. I've beaten it, and there's a huge sense of achievement in doing so.