Genre: action, fantasy, etc. Whatever you want to be
Story: once upon a time in the modern world dungeons started appearing everywhere, from china to antarctica. Humans were being slaughtered until heroes rose, these heroes obtained powers from these dungeons and used said powers to save humanity. An all out war occurred, billions of lives lost, but regretfully humans lost... and now these heroes were slaughtered like their kin, a few years later only a few humans remained by staying hidden. Nobody wanted anything to change, they did not want to die... until a final hero emerged from the shadows, this heroes led a fight to regain humanity, the operations were a massive success being able to create... The Last Fortess Of Humanity... until he died of old age and the remaining humans were slaughtered to extinction! The main character is a monster who lost his/her parents to the human war.
Genre: isekai, comedy, etc. Etc.
Story: a man/woman gets hit by a truck, and gets transported into another world... not as the protaginist? Protagonist? Protaganist? Whatever i forgot. But as the manager of the system to help the main character with his life! If mc dies so does he/she. What is worse is that the mc does whatever he/she wants and never listens to you the sprite or system manager.
Genre: isekai, action etc etc.
Story: a man/woman dies in whatever way anyone would want... and gets reincarnated again... in hell, as a lost soul, everything is biblically accurate except for one thing. The mc actually has the ability to change her path to heaven, having a level up system to help in her journey through another chance at life. But he/she only has this, nothing else, no shop, to system sprite, no gacha, no anything except an exp bar and stats to level up through. If he/she succeeds mc will be granted a wish along with the level up system and his/her memories in the next life. And if he/she fails? Who knows...