Gin-iro no Olynssis

If you're looking for manga similar to Gin-iro no Olynssis, you might like these titles.

Overman King Gainer

Overman King Gainer

As the result of heavy pollution, mankind now lives in remote and desolate locations in order to survive. The government rules with an iron fist, keeping close control over the masses. Gainer is a boy who has been playing a video game so much that he has finally secured the title of King. However, the next day he is falsely arrested for allegedly starting an Exodus – a journey to the mythical paradise known as Yapan. While in prison, fellow prisoner Gain offers to help Gainer escape, so with nothing to lose Gainer finds an Overman and makes his exit. However, in order to return the favor, Gainer chooses to further Gain’s cause: protecting the Exodus movement, even though Gainer’s parents were killed for their anti-Exodus ways…

I agree

The Third

The Third

Many years after a devastating war, Earth is now being watched by a group of beings known as The Third, named for the third red eye on their forehead that can access various computer systems. Navigating this barren, apocalyptic landscape is Honoka, a jill-of-all-trades who uses her powers to keep her friends from The Third's deadly grasp.

I agree

After War Gundam X

After War Gundam X

Humanity is on the brink of extinction after a devastating space war. Vicious packs of mercenaries known as "Vultures" comb Earth's remains for weapons, supplies, or anything else to give them power. Young Garrod Ran, an orphan of the war, is hired to rescue a kidnapped girl. But in time, he discovers that his target is a powerful enhanced human called a "Newtype" who is set to be the target of terrible and inhumane experiments. Now, Garrod and his new friends must escape, while trying to save the human race from repeating its mistakes yet again.

I agree

Junk Force

Junk Force

The year is 2100! On a barren Earth, natural environmental reproduction is no longer possible. The population has placed its stakes on a reckless organization in hopes that it can purify the planet for environmental growth. But the organization known as Z.P.T. fails tragically. Many humans are transformed to white sand. Was this massacre an accident, or does Z.P.T. hold some dark intent for the unfortunate inhabitants? In this post-apocalyptic future three buxom young women - Liza, Wooty, Mill - and one fortunate young man, Louis, use their mechanical prowess to fend off waves Z.P.T.'s superior mechanized military forces.

I agree

DARLING in the FRANXX

DARLING in the FRANXX

Set in the distant future, the land is ruined and humanity establishes the mobile fort city Plantation. Pilots produced inside Plantation live in Mistilteinn, also know as the "birdcage." Children live there knowing nothing of the outside world or the freedom of the sky. Their lives consist of battling to carry out missions. Their enemies are mysterious giant lifeforms known as Kyouryuu, and the children pilot robots called Franxx to face off against them. For the children, riding the Franxx proves their existence. A boy named Hiro is called Code:016, and he was once known as a prodigy. However, he has fallen behind, and his existence seems unnecessary. Not piloting a Franxx is the same as ceasing to exist. One day, a mysterious girl known as "Zero Two" appears before him. Two horns grow out of her head.

I agree

Black Bullet

Black Bullet

The near future. A terrible battle against a parasitic virus called "Gastrea" has been fought...and lost. Humanity is cornered and lives in despair. Rentaro and Enju face constant danger in their work as a team of specialists working for the Tendo Civil Security Agency, one of several groups dedicated to fighting Gastrea. Enju is one of the "cursed children," who survived the virus and gained superhuman powers as a result. A crazed top-hat-wearing terrorist is on the loose, but Rentaro's got his hands full just dealing with his fellow civsec agents!

I agree

Bigger Hunter

Bigger Hunter

God appears among us once every 90 days… And those who issued oracles from God, as the family of God, are taken away by Him. The people call the family of god “Sun” and send them forth with shouts of encouragement. “Suns” are truly human vessels envied by all for having received the greatest glory… However, There was never the slightest hint of joy in the expressions of those taken by God.

I agree

Heavy Object S

Heavy Object S

The story revolves around Objects — powerful, massive weapons that change the course of warfare — and Elite Object pilots. An odd Elite girl named Milinda meets Quenser, a student who aims to become a Object mechanic, with the soldier-in-training Heivia on a snowy battlefield

I agree

Eirun Last Code: Kakuu Sekai yori Senjou e

Eirun Last Code: Kakuu Sekai yori Senjou e

AD 2070, more than half a century has passed since the humans first got attacked by the mysterious living entity known as "Mariss". But the spirit of Celen, the pilot of Destblum, the only Heavy Weapon that can possibly oppose Mariss, has been repeatedly sapped by the hopelessness of battle. Before going out for a sortie, she had been captured for scheming to escape, and was forcibly made to sortie on the battlefield. But, on that day, a miracle fell onto the battlefield. A mysterious Fighter from an unknown nationality appeared with a Super Weapon not obtainable from this world and purged Mariss. The humans were roused. Even then, the Pilot that came out from that Fighter was a carbon copy of Eirun Bazatt, the Pilot in the hugely popular anime "Doll Waltz Requiem"-!?

I agree

Neon Genesis Evangelion

Neon Genesis Evangelion

It is the year 2015, and Tokyo-3 is under attack by the Angels. With fifteen years of relative peace disrupted, mankind faces its toughest enemy. Summoned by his father to NERV headquarters, Shinji Ikari finds himself tasked with having to pilot an Evangelion - a powerful weapon which is humanity's only chance of defeating the Angels. As well as having to shoulder the burden of protecting a city, Shinji must struggle with school, his father and his fellow pilots as well as himself. But will he even be able to survive his first encounter against the enemy?

I agree