SuperDuper

In a world turned into a deadly game, Alex Grant, an ordinary high school student, finds himself thrust into an apocalyptic reality where Earth has been selected as Game World N31459. With invaders and monsters descending from the skies, humanity is forced to fight for survival. As Alex navigates through the chaos, he discovers a game-like system in his mind, granting him access to items, abilities, and quests. Using a rare "Blessing Stone," he gains temporary god-like powers, boosting his strength and endurance. Tasked with surviving the first week of the invasion, Alex fights terrifying creatures and encounters other survivors, each struggling to adapt to their new powers and the terrifying monsters attacking their world. Along the way, he earns valuable loot, including rare "Awakening Stones" that promise to unlock even greater power. With his R-level potential, Alex quickly becomes a force to be reckoned with, but the battles only grow more dangerous. The world has become a brutal game of survival, and Alex must use every advantage he gains to protect those around him and unravel the mysteries behind the invasion.

Oliver, a promising mage who made it all the way to the 69th floor of [The Tower] finds himself with an opportunity to start all over again from before he got summoned. Will he be able to reach the top not only of the tower but also magic? Follow Oliver as he tries to become as strong as possible through the floors of the tower, hoping to not repeat his faileres. story is inspired by return: rebirth of the rainbow mage by NightWind, but since he doesn't plan on continuing his work I hope that the fans of his work find some enjoyment in this novel.