Genre - Mecha

April 10th. Yesterday was the last day of spring vacation, so starting this morning it was a school day. After being woken up by his cute little sister, Itsuka Shidou believed that it would be the start of another normal day. As for predicting the chance meeting with the girl who called herself a spirit...... Along with a sudden shockwave, the townscape vanished without a trace. In a corner of the street which had now become a crater, the girl was there. "—You, have you come to kill me too?" She is the disaster that will destroy humanity, a monster of unknown origin, and a being rejected by the world. There are only two ways to stop this girl: annihilation, and conversation. His little sister Kotori, wrapped in a military uniform, thus said to Shidou: "Since it's like this, just go date her, and make the spirit fall for you!" "Wh.. whaaaaaaaat!?" Enter a new age of boy meets girl!!

Clockworkers- mechanical men, created during the war as a weapon to kill as many as possible. That war may be long over, but rogue Clockworkers are still roaming about, spreading fear and death wherever they go. Machina's a member of the CWA, an organization dedicated to the destruction of these rogue robots. Along with Deus, her Clockworker partner, she travels the country in pursuit of these dangerous robots... [MangaUpdates/Horobi no Michi]

In the mid 21st century, human civilization is in dire straits. Gene technology had found a huge market, and due to huge profits, research had accelerated accordingly. An “immortality” gene no longer seemed like a mere dream. However, a sample of this gene was accidentally mixed with a biohazard, creating a new life-form. “They” also took in genetic materials from the natural world, evolving into an enemy that has invaded the human world. The “Shahel” are now a force capable of defeating human military forces, and at this point in time both the North and South American continents have fallen under their control. The USA, among others, no longer exists on the map. In Japan, the government has created and is working on improving a “samurai” unit to oppose the Shahel, utilizing soldiers enhanced with nano-machines to connect with an armored exoskeleton. It is at this point that Tsukahara Takemichi is assigned to the 1st platoon at the “Place of the Samurai.”

In Esora, a city built around a colossal radio tower, a young man -- Nishina Kazu -- tires of the unchanging everyday world that he captures on his video camera. One day, as he is video taping some abandoned buildings, there is suddenly an explosion and a girl called Mamiru Ai appears before him. This marks the beginning of the change from the ordinary that he had been hoping for...

Renton is a 14-year-old boy who occasionally helps out his grandfather as a mechanic. But his feelings of dissatisfaction and frustration grows as his mundane and routine work clouds his visions for his future and he dreams of flying around the world. It isn't until one day, a large human-like mech, a LFO (Light Finding Operation), falls from the sky in front of Renton and appearing from the depths of the machine is a beautiful young girl named Eureka. And as she asks the dumbfounded Renton for repairs, the two will embark upon a fantastic journey into the unknown.

Manga sequel to the Eureka Seven anime series. The story centers around a boy named Ao who "sets 'destiny' in motion again when he holds the 'power'". (Source: ANN)

Spin-off set in the same world as Eureka Seven AO, following the adventures of heroine Yuna Maltan.

Ao, Fleur and Elena begin living respectively in the Fukai House, in Okinawa, alongside Noah and Naru, who lost her home when a Secret assaulted the island.

From Anime News Network: Several thousands of years from now, there exists the Joker Galaxy of five Star Systems, where a long, long war is being fought. The god of light, Amaterasu, is trying to unite the galaxy under his rule. The fighting stands between giant mecha called Mortar Headds, their pilots, the Headdliners, trained since birth for their task, and the female humanlike computers called Fatimas, necessary for controlling the MH. Many are the lives and destinies found throughout the more than thousand year long era of war, although Amaterasu seems to live through it all. Note: To honor its 25th anniversary, the series was reprinted under Five Star Monogatari Reboot (The Five Star Stories Reboot) with a final and 13th volume.

Adapted from the Front Mission games. Huffman Island is a land split by an uneasy cease-fire between two major world powers, the USN (United States of the New Continent) and the OCU (Oceania Cooperative Union). The cease-fire has held for 20 years, but now tensions are mounting, and it looks like open war will break out again soon. Matsuda Akira has gone to join the on-site reporting team for NNTV. Are he and his colleagues really ready for the horrors they may face if they're caught in the middle of a war?

Trouble always seems to follow the beautiful and sassy, Kaname Chidori. Though she is only a high-school student, Kaname is constantly the target of terrorism. Lucky for her though, the dreamy Sosuke, an undercover agent from Mithril, is one step behind her, ready to protect her at any cost. But will he be able to save her from harm every time she is in trouble?

Following the Tuatha de Danaan's seajacking incident, things are back to normal at Jindai High School in Tokyo, or as normal as they get with Sousuke guarding Kaname. After finding out who betrayed Mithril and caused the seajacking incident, Kurz and Mao are sent on a top secret mission in order to capture and bring the traitor back. However, Sousuke and Kaname's lives are about to change when they meet Leonard Testarossa, a high ranking member of a mysterious group named Amalgam. After their meeting, Leonard warns her that he would do anything to recruit her even if it means war in the streets of Tokyo.

This is another story in the Full Metal Panic universe, set ten years after the events with Sousuke and Kaname. Ichinose Tatsuya is a pretty normal high school boy, who lives with his father and little sister Yukari. He has a tendency to fall in love with foreign women, which has never turned out well for him. One day, while up in the mountains driving a Power Slave to help out with his father's company, he runs into yet another beautiful foreign woman, called Adelina. He lends her a hand and is surprised to see that she has a military Arm Slave, called "Shadow," with her. What is this mysterious and highly armed woman doing up in the mountains? Tatsuya's life is about to get a lot more exciting.

Naota's life isn't simple: he lives with his eccentric father and grandfather in a two-story house above a family-owned bakery in a town marked by a gigantic factory at its heart. The factory looks suspiciously like a hand iron, complete with a steam release at the top--not the most typical landmark. Life is already strange enough, but to top it off, his older brother's ex-girlfriend starts making extremely suggestive passes at him... and an impish, playful alien smacks him in the head with a bass guitar and then infuses herself into his family.

Ryoma Nagare, Hayato Jin, and Prof. Saotome pilot three specially designed combat jets, which can be combined together in different forms to form three different kinds of giant robots, Getter-1 (used for aerial combat), Getter-2 (for land-based conflicts), and Getter-3 (for undersea battles). They were assembled by Prof. Saotome and became Earth's first line of defense against the Dinosaur Empire, which is a civilization of reptile-like humanoids, who evolved from the now-extinct dinosaurs that roamed the earth millions of years ago. The series was groundbreaking in the anime mecha genre: for the very first time, it introduced the concept of separate machines combining to form a super robot. Using three jets, Getter Robo could combine in three different ways to create three different versions of Getter Robo for different conditions and situations. This idea was originally discussed during the creation process for Mazinger Z (the first super robot to be piloted internally), but was dropped and then developed for Getter Robo. This combination idea proved to be a very powerful concept that has been used in the super robot genre ever since.