A great game
The strong point of Bio Shock is its story and character development. With a great voice acting ensemble. Bio Shock tells its tale throuhg audio excerpts. The game play itself is entirely customizable. Your can inter-change your power-ups throughout the game and there is no charge in changing yourself.
But because of this the game is simply TOO EASY. There is very little penalty from dying. In fact to take down some hard enemies you would simply find yourself bum rushing your adversary and tossing body after body till they themselves die. The enemy AI is quite horrendous, it seems they are mindless zombies awaiting their deaths as they charge at you.
Over all, this game scores decently on a very intriguing storyline as a utopia gone wrong, but you are going to be extremely let down on its difficulty.