sin system: demonic harem after reincarnation

System! I always dreamed to have a system, to get out of my boring and shitty life. Surprisingly the day of my birthday I got one, but I was not the only one, the whole world received a system, and the people who were born in the 3rd day of September got a gift pack, and I was one of them. But the shocking thing is that we got a system notification that the earth will be invaded by another dimension in two weeks time and everyone should prepare for it. ------ Author's note ------ Hi everyone, I want to warn you about this novel there will be a lot of mistakes, English is not my native language (I am only using Google Translate), and I am not a professional writer. I am just an amateur of novels and want to put my idea to life. Please if you see a mistake kindly tell it to me in a comment and I will correct it. Thanks for your understanding.

After breaking up with his girlfriend, Eric Johnson married a beautiful female CEO to cover his father's $15,000 surgical bill.

Betrayed by the one person he loves the most and battered to the brink of death– he was left to gasp at the face of death, slowly counting his time till his consciousness faded. In that dreaded moment all that Aiden could think of was getting back at those who put him in this place. His desire for vengeance and power soared through every muscles of his– that desire awakened in him an answer. [Do you want to avenge yourself] [Do you seek to stand on top of the world with fame, riches and glory] [Do you want to make your enemies tremble at the sight of your might] [You have activated The Vengeance System] [Host is 99.99% compatible with 'The Vengeance Systsm'] With a new variable, follow Aiden on his path from rags to riches and his bloody revenge against his foes...

Menphis Jackman was a meager wage worker, humbly enduring and compromising for mere money, renowned for his uselessness. He was both penniless and heavily indebted, only to be oppressed and looked down upon by others. But then one day, a large skull appeared in the town, with zombies everywhere, danger and death ominously surrounding him, and suddenly the harsh sound of machinery echoed in Menphis’s mind. It was no different from the RPG system he had once known. It gave him strength, abilities, and resources, a lot of resources, very, very many resources. To the point where he had to think: ‘How to destroy my resources?’

There was once a guy that is indiferent and clueless about everything around him, but even though he was like this, if monster after monsters appeared at his doorsteps without any invitation at all, his eyes will glow with indifference and touch their rough bodies lightly, turning it into ash and get carried away by the wind that pass by. His name is Gabriel, A shut-in guy but is omnipotent. Read to know his story.

After being struck by lightning, Farouk finds himself in a different world possessing a new body with a new family, and finally, a game-like system where he can level up, acquire skills, and distribute points to his stats. He attends an academy of martial artists aiming to graduate at the top and become the strongest. However, an evil organization lurks within the shadows. Will Farouk, now known as Spectra succeed in his ordeal or will he perish in his attempt?

“Aren't we all tired of reading about heroes who are binded by law and righteousness and can't act on their own free will or villains who are just bad and evil, why don't we try something different, something like anti hero who aren't binded by the law". Follow zero who is regarded as a useless hero on his adventure across a mythical world full of adventures and danger.

In a world where Earth was invaded by giant spaceships and towering, blue-skinned beings known as the Maulaks, humanity teetered on the brink of destruction. But when supernatural beings emerged from the shadows to defend the planet, the tide began to turn. A mysterious figure named Marvel Holstein appeared, distributing ancient texts that held the secrets of awakening powerful abilities and forging potent weapons. With this newfound knowledge, humans joined forces with supernatural allies to drive the Maulaks back, forcing their mother ship to retreat. In the aftermath, the Earth Federation decreed that all teenagers must undergo two years of military training to unlock their latent abilities. However, the abilities taught in these programs were often weak, and only the wealthy could afford more powerful abilities. Rylan, a street-smart orphan whose parents fell in battle, was left to face the harsh reality of being ability-less in a world where powers were the norm. His only legacy from his parents was a cryptic letter, sealed until his 17th birthday, and a pendant he wore around his neck. But when Rylan finally opened the letter, he discovered a shocking truth about his true identity – one that would change his life forever.

"These are pretty minuscule spies, my lord," The leader said into his comms. They chattered among themselves. We had our hands up when they surrounded us. My throat clogged and I was running out of oxygen. I could barely think or breath. Mister Wigglesworth was talking briskly with bulging eyes to the colossal men and a rifle was lodged in his throat, he seemed frail and agitated. "Mort!" He threw the parcel into his hands. Mort winced when he failed to catch it. The box malfunctioned and I screamed at the blast and fell back into the shelter of more craters. I gasped. "What do I do with this?" His hand fidgeted on the and he dived behind a crate beside me while lasers flew. He panted and glanced at me holding on to the parcel. There was a skirmish going on. "I think I got hit." .... Remember when homicidal aliens were attacking us? This was now, yeah, it was kind of my fault. We were crouching like a couple of cowardly war veterans on a battlefield and Mister Wigglesworth! Of all people was out there holding them off. Mort held on to the prism parcel. My eyes were pale. I got hit by the parcel. I held on to my stomach. "Are you okay? Can you sit up straight?" He said. "No, it hurts," I did not feel like myself at all. I was not even in the mood to make snappy comebacks, I kept seeing double and all these color spectrums like I stared at the sun for too long. I was phasing in and out of consciousness. I thought I saw planets dying. I ducked over the end and focused on breath. [ System Activated ]

Jed Hunter only has one year left to live on this alien-invaded Earth. So, he creates a bucket list of things he always wanted to do. Except he is eaten by a monstrous alien and... [System activated.] [Consume alien core to activate Ultimate Skill – Devour.] With Devour System, Jed can extract alien’s strength and unique powers to use as his own. He could eradicate all aliens on Earth before he die. But, what fun is there if he stop crossing off his bucket list for it?