Harry Potter: Eclipse. - Chapter 30:

The main character is reborn as a character from a game he played in his previous life. This character falls into ruin along with the villainess, spending the last of their years together. A man named Kururi Helan.

This novel is also known as Almighty Video Game Designer

Chen Mo a game designer got sent to a parallel world with advance technology but undeveloped game concepts.

Watch as he redefines the world’s gaming industry with the games he remade from his old world.

- Description from Novelupdates

April 4th.

The apocalypse descended, mountains and rivers shattered, and the human world turned into purgatory.

April 5th.

“Brother Wang Tao, before I die, I ask you for a favor, please take care of my wife…”

April 7th.

Wang Tao unexpectedly discovered that he could not only see the HP bars of living creatures but also that the creatures he killed would drop loot!

“Rest in peace, Big Brother. I will definitely take good care of your wife!”

I’m a policeman, we took over the crime scene, and all the idlers and other people flashed!

Are you a detective? Do you have a formal license? Is it part of the police system? May I list you as a suspect?

Detective? Sorry didn’t hear it.

You want to reason? I’m sorry I’m not interested, but I’m standing there watching us handle the case!

Hey! Don’t move around at the crime scene, it’s you, that kid over there!

——New scum, listen to the teaching

- Description from novelbuddy