Doomsday: I Have a System, So Isn't Speedrunning This Just Fair?

【Apocalypse + speedrun + powerful protagonist + ruthless and decisive】 The apocalypse arrives. Zombies run rampant and mutant beasts wreak havoc. Fortunately, humans can gain skills by killing zombies and mutant beasts. They can also use crystals to raise their skill levels and improve their strength. But crystals are rare. You might find only around ten in a hundred beasts, and the higher a skill's level, the more crystals it takes to upgrade. Chen Peng transmigrates to this world and awakens the Apocalypse Survival System. Killing zombies earns experience, which directly raises skill levels. He doesn't need crystals at all. While others struggle to obtain a single skill, he is already loaded with powerful abilities. While others painstakingly raise a skill to level two, he is already level 40. While others finally reach level five, they discover that all the nearby zombies have been wiped out and the mutant beasts have been domesticated. While others build bases and dream of growing stronger and ruling the land, they are told the apocalypse is over. With the System at his side, Chen Peng leads his companions on a full-speed run through the apocalypse, conquering the entire world!