*NOTE: This review contains some minor spoilers, but I will do my best to keep it brief, concise, and to the point*
STORY: In the first half of the series, Van Flyheight is a zoid pilot who comes across a mysterious type of zoid known as an Organoid who he names Zeke, as well as a young girl named Fiona in pods found in mysterious ruins. Upon finding the two, Van finds himself the center of attention of bandits and soldiers alike who are after the Organoid's strange powers. Van and Fiona come across other characters and find themselves in the middle of a war, and have to do what they can to help bring peace to land and end this war. Zoids does a relatively decent job of keeping tone shifts frequent without overexaggerating it, often having serious moments albeit with light-hearted comedy when the mood needs to be brought up. The flow of the story feels natural, and feels neither rushed or slow. It has a nice, even pace that the viewer can easily enjoy. 9/10
ART: The art direction that Zoids took was aesthetically pleasing all around. Characters were detailed enough that they didn't stick out too much, but also were not too detailed to the extent that they distracted from the environment. It felt as though environments and characters had about the same effort put into them, so that neither were too distracting. Obviously, the Zoids were what the majority of the focus was put on, most likely being what most of the budget was used for. The zoids were rendered with high quality, and it shows. If anything in particular needed the most focus in terms of art, it was definitely the Zoids, and it shows. That being said, the only real flaw I can see with them is that some animations were clearly recycled throughout the series, but it's not incredibly noticeable so it isn't really that big of an issue. 9/10
SOUND: As much as I personally enjoy the soundtrack, I do have some issues with it; the main problem I have is that the soundtrack can often times sound a little repetitive while other times is a little too scarce. There's nothing wrong with having certain audio tracks be more common than others, but eventually it gets to the point where some tracks sound as though they're heard in almost every episode. I felt that there could have been a little more variety in certain places, and that occasionally, certain tracks did not fully fit the mood. Yet in other situations, the soundtrack did its job very well, helping in creating the particular mood of a scene. I felt that the type of music used did fit the overall environment of the show, using both fast paced action-themed music for fighting, and softer, more melodic music for scenes involving development of characters. 7.5/10
CHARACTER: In Zoids, the characters can really be hit or miss. Some aren't as fleshed out as others, but the main cast is fleshed out enough that the viewer cares about them and wants to see them succeed. Van Flyheight is the most developed character by far, as the second half of the series, Guardian Forces, focuses on how much Van has matured since the first half of the series (there is a small time skip in between), and they really emphasize just how much he's changed, going from often being a jokester kind of character to a more serious character who cares about protecting those dear to him. The show also does a nice job in creating sympathy for certain characters who start off as villains but have a change of heart as the series progresses. Unfortunately, while Zoids does a great job in developing the main protagonists, the show falls a bit short in terms of the main antagonists, who sadly fall into the usual trope of being evil for the sake of being evil. That being said, they are not part of the main focus of development to begin with, and while it would be nice to see them developed more, at the very least the main and supporting cast have enough development to keep the viewer caring for them. 8.5/10
ENJOYMENT: The biggest part of enjoyment typically comes from watching the Zoid battles throughout the series. They have a mix of fast paced action and often strategic ways of fighting, appealing to more than just one audience with the way the battles are handled. There is drama involved, but it is not shoved in the viewer's face. There is a nice, even pacing between the fighting and story elements, so neither feels overdone. Light hearted moments in the show are welcome when they are as the action and serious tone will bring characters back to reality. The show has a nice, enjoyable pace from start to finish, introducing slight changes in the second half so as not to be repetitive. 9.5/10
OVERALL: Zoids: Chaotic Century/Guardian Force gives off the feeling of being along for an adventure. It develops its characters enough to make the viewer care for them, and want to see them get to the end of their journey. You follow them along, and through thick and thin, they keep fighting, and the journey goes through various types of drama and has an adventurous feel. A lot of the series is about the maturity of Van as a character too, and you see him grow from a young boy to a man who fights for what he believes in. You also see the evolution of how the likes of Fiona and several other characters develop throughout the series, and by the end, their relationships feel genuine. The characters feel like those who can be related to by the viewer. It has all the feelings of an adventure, from humble beginnings to the maturity one gains from it.
Final Score: 10/10 : Would recommend to any anime fan.