Crossing Reality and Game: I am Achievement Master - Chapter 47 – Wolf Feast

A lecherous army special task force soldier from 21st-century Hong Kong is selected to travel back in time, choosing to go to the Chinese Warring States Period. Unfortunately, the time machine runs into an error during the experiment. With no foreseeable way to return to the present, he must use his combat skills and knowledge of history to thrive in his new life in the year 251 BC.

First World : CampioneCurrent - Second World: High School DxDThird World: ???Reincarnated into the world of Campione! Haru Kasugano, our hero slays gods and ascends as the mightiest Godslayer. He battles powerful God-Kings and Campiones, claiming victory after victory. Whatever it is. [Wealth, Power, Beauty] he has it All. Watch him grow stronger as he travels into new realms like High School DxD and the Fateverse, leaving a trail of defeated gods and captivated hearts in his wake.

A skilled but unfortunate modern-day assassin was killed in a freak accident. However, he soon found himself summoned to another world by an evil wizard, who had him possess the body of a boy as an experiment. After successfully planning the evil wizard’s downfall, he used the wizard’s body as a springboard to gain influence and power in his new world.

- Description from Novelupdates

Somebody once told a joke.A man ran in place all his life. He worked a job he didn't love for people he couldn't stand. But at the end of the day, the number in his bank account went up.That man got a second chance at life. He woke up in another world, full of adventures and romances and monsters and gods. And floating above his head he saw the number “1”. So what did he say?“Gosh I better make the number go up.”Not today. Not for this old soul. Reborn as a beast of battle meant to live a short life and die screaming, Garek refuses. He puts the madness of skills and levels behind him and sets out to found a little farmstead. He grows crops. Maybe someday he'll get a pig, and have bacon.It's a shame the world won't let him be. It's a shame that the warmongers and level-grinders hate nothing more than a soul at peace.He put down his sword for a plowshare, but when trouble comes calling, he'll pick it up again.