There is an interesting storyline that follows the games progress to keep you mildly entertained. Sonny is one of the top rated armor games and its easy to see why as soon as you start playing it. You start the game on a cruise boat fighting zombies and the story escalates from there, Sonny is being aided by his friend, they are both looking to be rescued by an elite team of soldiers but instead are betrayed, with Sonny's friend killed, he is forced to take matters completely into his own hands.
Throughout the fight scenes it is easy to run out of 'focus points', these points give you the ability to attack your targets, without a sufficient supply, you cannot attack and therefore will be defenseless against your enemies, so it is not as simple as just attacking relentlessly, you must use your limited resources and abilities wisely.
Although you have a superior amount of health compared to your enemies, they usually fight in greater numbers which means you will have to handle 2, 3 and more at any time. Damage limitation is very important which is where abilities such as suppression come in handy, use this particular ability to increase the chance of your opponent missing you with his attack and to decrease his damage.
Sonny is well worth spending time playing and getting involved in, although it has a storyline and some depth, it isn't designed to take up all of your day and has the option to save your progress, enjoy!