If you're looking for manga similar to Goodbye Eden, you might like these titles.
After a major natural disaster, earth is slowly transforming into a desert in which mankind tries to survive. Water becomes a precious resource and the center of political intrigues. In the middle of this, a young boy, member of a gang, encounters a beautiful girl who's a merciless warrior and holder of the key to the salvage of humanity.
Utsuo's grandfather died on the boy's sixteenth birthday, at the old age of 140 years. He left behind a love of motorcycles – a trait that Utsuo shares, much to the dismay of his family. Living day to day underneath a dome that protects the city from the toxic outside air, the boy has become complacent with his life, and soon finds himself on a thrilling adventure...
En has no prospects as a child of the slums—he ekes out a living by selling the scrap cyborg augmentations he scavenges to anyone who will buy. But when he's forced to go through some unethical experimentation, he transforms—making him eligible to become a fighter in the only thing that matters in this bleak world: The Rokudo Tournament!
In a deserted post-apocalyptic metropolis riddled with a mysterious material a young girl is searching for any signs of life and supplies.
Follow the story of a boy trying to fly and a girl trying to rebuild a tower. Together, they traverse a post-apocalyptic world.
Taking place after the destruction of the world by the Devil Moon. Follows a half-mage who works as the executioner of mages and a girl-mage who suddenly appears before him.
Ray and Trice grew up together in this post-apocalyptic world. She was his only friend. But then one day... an unwelcome guest arrives and proclaims "Glory to Humans"...
Earth after World War II. Rebuilding after the destruction has given rise to various vices. Disposers roam the cities cloaked in shadow and mystery. Kaede is a Disposer of SA rank, the highest level a disposer can reach. But he has to be in Central City, he must find the one who murdered his father...at any cost.