I'm a sucker for these top-down shooter games. This is the type of game I imagined playing back when the cutting edge AAA title was Berzerk for the 2600. I have yet to find one that actually rises to my expectations. Shadowgrounds is okay, but there is a clunkiness to the whole package that keeps it from being a great game.
Aside from the wooden voice acting and forgettable story, the combat needed to be amped up a little more. Enemies take several hits to kill and the battles all feel like your just running backwards and shooting. Maybe some better designed environments, with more options for exploration and interaction, would have made the difference. Or maybe just a more massive onslaught of easier to kill enemies and a more arcade feel would have been better. I don't know.