Viper's creed is a definitely an anime that needs more attention and I am surprised that it is so unpopular after watching it myself. Though not a master in any main areas you would rate an anime I feel it does not have any huge weak points.
Story: 7/10
The story is based 8 years after a major war that has left with most of the earth submerged under water. The main characters are a group of former mercenaries who are part of the Viper Unit of a private army. Their job consist of taking out threats from rebels and protect the city with the use of their mechs.
Viper's creed is broken up into 2 halves. The first focusing on more of an introduction of the plot where each main character gets their share of screen time so we can truly understand and relate to our mercenaries. The second half is where things really kick in story wise as we go through an action packed and sometimes emotional joyride.
Art: 7/10
Animation looks solid enough. Action scenes are well done, loaded with bullets and rockets and explosions all over the place. I did notice that their wasn't much going on in terms of the background and there are a few re used animation frames here and there but nothing to really complain about.
Sound: 6/10
Opening song is nothing to really pay attention too. The ending song I felt did not fit this type of anime at all but near the ending with what unfolds as the series goes on I felt it was actually a good match. Music used throughout the anime is good enough and usually fits with the scenes going on.
Characters: 7/10
One thing I actually really like is how the characters were handled in this series. Each one of the main characters of the Viper Unit get an episode dedicated to themselves in the first half. Here we get some back story on them and learn to see exactly why they act in certain ways. On the outside you would just think these guys are just money hungry mercenaries fighting for riches but they all have some form of back story that makes you understand who they really are. What I've noticed is that by the end of the series I really didn't have a favorite character or one I really disliked. I would think that is because of how each character was handled and used by the studio. It was done in a way that no one truly out shined the other, they all got their moment in the spotlight.
Enjoyment: 8/10
Definitely enjoyed this show. If you are a fan of the mecha and military settings I definitely recommend you give it try if you are looking for something to watch.
Overall: 7/10
Good, solid series overall. As mentioned earlier there is no area in Viper Creed that truly stands out compared to other anime you may watch but it also doesn't have any extreme weak points being exposed. With only 12 episodes you can run though it on a Sunday afternoon and experience this action packed ride.