Highly Skilled Assassin: from the Poor to the Top of the World

[Assassin skills + upgrade flow + no harem] A hundred years ago, a meteorite hit the Blue Star. After that, various animals and plants mutated wildly inexplicably. Humans discovered that they could absorb star power, awaken their talents, and become warriors. The strong built steel city walls to resist the invasion of monsters and continue the fire of civilization. Lin Yan came through time with the game panel. In his eyes, enemies and monsters were experiences. In the mall, you can find equipment, potions, skill books, and pet eggs. Leveling up along the way, I learned various skills, including sneaking, eviscerating, blitzing, disappearing... What he does is a set of combos without explanation. After joining the law enforcement team, his upgrade speed accelerated. Fugitive: "Who killed me, and who did I kill?" Lin Yan: "Take a deep breath. It's normal to feel dizzy. Get over it." Warcraft: "I don't know what happened, but the dragon egg was stolen." Lin Yan: "That's what I'm saying. Can you call me stealing? I'm openly robbing." Teammate: "Why do they say you don't have martial ethics and like to carry out sneak attacks?" Lin Yan: "Can that be called a sneak attack? That's called tactics." Many years later, Lin Yan led a team to explore the extraterrestrial meteorite and discovered the secret of this world...