If you're looking for manga similar to Cage of Eden, you might like these titles. All recommendations are made by Anime-Planet users like you!
When Ryouga was a boy, he was the sole survivor of a terrible plane crash; with horror, he watched as the other survivors were eaten by a terrifying monster, healing Ryouga's wounds in the process. As a teenager, Ryouga is haunted by these memories and agrees to go with a stranger to a mysterious school for special people. However, little did Ryouga know that within the school's walls lied a brutal game in which cards are used to summon monsters and obliterate other players. Armed with an exceptionally powerful card known as Death Rex, Ryouga must do everything in his power to win so that he may discover the truth behind his past and accept what fate requires of him to do.
Youngsters thrown into life-or-death situations that's way over their head? Check.
Monsters wrecking sss-stuff, including them? Check.
Chesty LaRues and buxom babes? Double D check.
ACTION ACTION ACTION THRILLS ACTION VIOLENCE FIGHTS ACTION! MANLY. CHECK.
Both are about the thrills, the fights, the crazy scenarios the kids are thrown into and the sheer manliness of everything, hot-blooded testosterone and sheer over-the-top battles. Giant monsters that can rip you limb from limb, badass characters and heroics abound, fight your dinner with your teeth before reading up on either one!
In 2137 AD, the sun released a massive flare across the solar system, creating the Geduld, a dense field of plasma and debris. In the midst of a routine descent into the Geduld's upper layers, the training ship Liebe Delta is crippled by a terrorist attack, killing the trainers and command crew - and exposing the vessel’s military secrets, which may hold the survivors’ only hope. With nowhere to hide from their darkest fears, the young trainees must work together to navigate the ravages of a solar system filled with mysterious, powerful foes. Yet, as the ship is forced into greater isolation and its inhabitants become increasingly desperate, they must struggle to survive against not only the forces that pursue them relentlessly... but also each other.
Natsu, Arashi and a few dozen others had gone to bed like any other night when they woke up... somewhere else. In this new post-apocalyptic future, mutated plants and animals lie in every direction and mankind is long extinct. Scientists of the past predicted that a meteorite would strike Earth and render the planet uninhabitable, so they devised a plan: they would cryogenically freeze five teams of young adults and have them revived by a computer when life is again sustainable. Seven people formed each team along with a guide specially trained to survive in the wild, and seven caches of supplies were left to be found. Together, the teams must try to survive in a new and hostile world, inadvertently finding the other survivors and clues to their circumstances along the way.
I personally think both of these manga are very good reads. Although the ending in Cage of Eden was somewhat rushed. The two manga are similar because they both deal with teenagers trying to survive in an unknown place with lots of strange creatures. The main differences are that there are not nearly as many deaths in 7 Seeds as there is in Cage of Eden and there is also less ecchi. I thoughly enjoyed both manga and I suggest that if you've tried one you should try the other.
In the early 21st century, mankind is decimated when plants rise up, eating the populace and swallowing cities with their foliage. The remaining humans retreat underground in hopes of a safe haven, but nowhere is safe from the unspeakable horrors that want to hunt them down, and supplies are running thin...
If being thrown into what appears to be a whole new world with gigantic, dangerous, carnivorous creatures is right up your alley, then these are both great mangas to read. Do you want your main protagonist to be named Akira and look similar because that is the case here. Cage of Eden has more ecchi and is more shounen than Green Worldz, but they have a lot of similar elements. People vs Plant, People vs Giant Carnivores, People vs People. Any battle besides People vs Gundam seems like it will take place in these two worlds. It is hard to read one of these without seeing the similarities.