World's Strongest Became the Game's Weakest Villain - Chapter 5 - : Mistakes

What happens when a scientist from a futuristic world reincarnates in a World of Magic and Knights? An awesome MC is what happens! A scientist’s goal is to explore the secrets of the universe, and this is exactly what Leylin sets out to do when he is reincarnated. Dark, cold and calculating, he makes use of all his resources as he sets off on his adventures to meet his goal. Face? Who needs that… Hmmm… that guy seems too powerful for me to take on now… I better keep a low profile for now. You want me to help you? Sure… but what benefit can I get out of it? Nothing? Bye. Hmmm… that guy looks like he might cause me problems in the future. Should I let him off for now and let him grow into someone that can threaten me….. Nahhh. *kill*-

Alternative: Leylin is transported from an advanced technological era into a medieval world— except there’s magic. Equipped with “only” his quick wits and an A.I. chip fused to his soul, he sets out to become the most powerful magus the world has ever known. In a land divided into the Light and Dark Magi, the weak can either be cattle or disposable slaves. Only the strong can determine their lives, and only they have the luxury for virtue. Yet strength is only a tool for Leylin, like any other. His goal, in the end, is his own.

Rebirth at the turn of the century, people are in Moscow, just got off the plane, ready to study abroad…

Wang Ye originally only wanted to be rich and safe, and to live his own life in a plain and happy way.

But being pushed by the hand of fate, he involuntarily went to the road of oligarchs!

- Description from novelbuddy

Qiao Zhiya is a hybrid. Before he was born, his elf father wanted him to have a strong physique unique to dwarfs; his dwarf mother wanted him to have a tall body unique to elves. And then he was born, his features delicate and beautiful, his body weak and thin… his strength at the peak of the dwarfs!

Then he crossed. With his beloved little hammer, we walk along females-who-is-as-tall-as-he-is and male-who-is-a-head-taller-than-him-on-average future… blue, thin mushroom wants to go home.

Chu Rong: picked up a small dwarf who always wants to run away. Its cute, wanna drag home.

Qiao Zhiya: ??? Mama, there’s a pervert!

- Description from Novelupdates