It's Not Easy Being Your Love Rival's Big Brother - Chapter 6

A decade ago, the first dungeon gates appeared, but some vanished before they were ever conquered. The MC, a low-rank hunter, awakens the Lost Gate System, granting him access to these forgotten dungeons where legendary monsters and artifacts are trapped. Each completed lost gate grants him absurd power, but also reveals terrifying truths—these dungeons are prisons for ancient beings who want revenge.

In a world where the strong rule, Ben is mistreated and humiliated. What happens when someone weak has the opportunity to gain power by doing bad deeds?(Revenge, action,sexo, violence)

It begins on the mountain.

With the glint of a knife, a flash of steel in the hands of a sworn brother. A betrayal.

Stabbed and pushed down the mountain, Zi Chen lied within the red-stained snow, left to die.

This is where it begins; he is given life by lightning,
baptized by thunder.

Those who had once betrayed him should all suffer in his cruel revenge.

- Description from Novelupdates

In the world of war games

Red Comet: “Amuro Ray, what kind of ability is it to bully recruits, come out and face me if you have the ability!”

Lin Youde shook his head: “What you’re looking for is Amuro Lei, what does it have to do with me, Li Abao?”

Go offline and return to the real world, to Konaku.

Lin Youde looked at the steel giant in Gnaku and couldn’t help sighing.

“Gundam is so handsome~!”

Correspondent: “Dr. Lin Youde, I have your sortie order.”

Lin Youde sighed: “Have it started again, stupid soul bound by gravity.”

Entering the cockpit of the red steel giant and opening the open door, Lin Youde said seriously.

“You guys, are you going to start a war again?”

“I just want to play games in peace!”

“Lin Youde, Gu Tie, attack!”

- Description from novelbuddy