If you're looking for manga similar to Synduality, you might like these titles.
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…
Meet Kyosuke Nanbu and see how one man, this one man is pulled into a fate that involves politic conspiracies, military weapon development run conflicts, betrayals, revolts, people with super natural powers & an enemy extra terrestrial invading menace. Even though he is just a "regular human", Kyosuke is to the core a brave man who will not be shunned "so easily" and at the command of his own trademark machine, the so called old fashioned "Alt Eisen" he will lunge towards the center of the conflict and will blow away everything that stands in his way.
Witness the origin of Mega Man, his first battles with Dr. Wily and the evil Robot Masters, plus appearances from Dr. Light, Roll, Proto Man, Rush, and many more Mega Man favorites!
The original blue bomber is back for more action-packed adventures in Mega Man Gigamix! In this volume, Mega Man travels to outer space to tangle with Dr. Wily’s Robot Masters, as well as the mysterious Break Man! Then, it’s the ultimate race! Mega Man, Bass, Roll, Proto Man, Ice Man, Guts Man, and even Dr. Wily himself go head-to-head in a race that spans halfway across the globe!
The urban legend in the battlefield known as the “Moving Corpse Storeroom” where anyone who encounters it would disappear completely along with their corpse. A young girl, Noel had her life saved at the Moving Corpse Storeroom by Scissor, and began to work together with him along with his robotic maid Helenne and the mechanic Dan. They were a group which did not belong to any single brigade and only took jobs which Scissor accepted. One day, they were attacked by a defective Lost Pack unit. They also discovered a secret laboratory which even Scissor, who did not feature any bodily enhancement, could not enter. And the mysterious keyword “Fairy-possessed”. What is the big secret which Scissor hides—!?
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.
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.