This game is very like Cyberia; the moving path is predictable, and all you have to do is shoot at anything that moves, and enjoy the animated sequences in between every mission. The time is set somewhere in the near future, and there is a major war active on your planet. By the time war is battling, the infamous and most dangerous international prisoner was rescued, and the prison guards were killed. As much as you don't want to participate in that action (since you're more interested in winning the war), you, as a great undercover agent are sent to bring the prisoner back. No matter the cost. As you can guess by the title, most action is taken under the water, and a few rare are battled in the space above. Bring him back commander!