If you're looking for manga similar to Taiheiyou X Point, you might like these titles.
As the countries of the world continue to fight each other over seemingly trivial matters, the human race continues to experiment with solar and atomic bombs. For many years, the Nation of Star has conducted their nuclear research on the secluded Horseshoe Island and, as a result, the creatures living there have begun to rapidly evolve. One such species, known as the Fumoon, have recently emerged and are able to harness the power of gravity to send not just people but even warships flying! Though with the world at war, and a new race of creatures threatening the human race, Earth is in further peril as a dark gaseous cloud is rapidly heading for the planet and will extinguish all life when it arrives...
Six tales of mecha war and redemption. Civil war has broken out on the planet Sodom, and the only way to survive is by using the mechas left behind by a mysterious alien race. The two sides must find common ground in their humanity or they will annihilate each other.
When humans came down from the sky they brought the Testament, the guide to the path they must follow if they wish to return to the skies. Now, in a world where only the islands of Japan are inhabitable, the nations of the world vie for power. But the Testament ends abruptly, and it is now the last year. Is this the end of humanity, or can Tori Aoi and his fellow students somehow affect the course of destiny? Who and what is the Horizon in the Middle of Nowhere?
In the future, warfare has been revolutionized by the invention of mechanical weapons called “Objects.” These Objects are overwhelmingly powerful, rendering traditional weapons like guns, tanks and fighter jets completely useless. Qwenthur is an un-athletic, but smart soldier who aims to work as an Object mechanic. Stationed at an Alaskan Object base, he meets Milinda, a stoic but beautiful Elite Soldier who pilots her own Object. As they learn to support each other in battle, Qwenthur begins to uncover the grim secret behind the Heavy Objects
When humans came down from the sky they brought the Testament, the guide to the path they must follow if they wish to return to the skies. Now, in a world where only the islands of Japan are inhabitable, the nations of the world vie for power. But the Testament ends abruptly, and it is now the last year. Is this the end of humanity, or can Tori Aoi and his fellow students somehow affect the course of destiny? Who and what is the Horizon in the Middle of Nowhere?