Global Class Change: Gifted Opportunities, Critical Hit Returns!

[Overpowered protagonist + no groveling after women + no holier-than-thou heroine + no female lead + wish fulfillment + realistic universe + prodigy showdown + grand worldbuilding + gets better as it goes] A century ago, the world changed. A game descended, and the bizarre invaded. "Galactic Empire" became humanity's last hope for rising to power. Fight monsters and level up, transcend the limits of life, evolve the human body, and eventually rival the gods! At the start, everyone chose a class. Some became mages, attacking from afar and killing enemies from a thousand miles away. Others became shadows, turning the dead of night into a paradise for assassins. Xiao Fan couldn't choose a class from the start, and became a frail primitive human. He thought he'd drawn the worst possible start, but unexpectedly awakened a System that returned explosive rewards for every opportunity he gave away! The more he gives, the greater the reward! "Just three days from the start, he leveled up ten times in a row, transcended the limits of life, became a Star God Warrior, and crushed an ancient Heavenly Emperor's avatar!" "That's not all. A week after the start, he obtained the Ancient Double Pupils, and the Eternal Desolate Longevity Emperor even crossed the river of time to teach him ancient techniques!" "In just a month, he reached level thirty and crushed a Demon God. I was so scared I wet myself!" Years later, whenever players across the universe recalled that man, they were struck with terror and fell silent! While they were still nervously forming parties to grind dungeons, fight monsters, and level up, Xiao Fan had already rallied his invincible army. With a starship in every soldier's hands, he marched into the Holy Domain and faced the gods! "Don't say I, Xiao Fan, didn't give you gods a chance. Come at me together! I'm invincible, so do whatever you like!"