Beating the European and American Powers in the Age of Empires

I was playing Age of Empires when the screen suddenly flared with dazzling light. After the light faded, my eyes opened to a grassland, with lumberjacks, miners, hunters, builders, and others beside me... I had actually transmigrated from reality into the game world, and it was the Stone Age as defined by the game! There was even a saber-toothed tiger nearby! Damn, how do I get back to reality? Just then, a line of text appeared in my mind: Develop to modern civilization as quickly as possible, conquer the other peoples, and unify this continent. Only when the game ends will you be able to return to reality... Slaughter Japan, defeat the Goths, annihilate the Mongols, crush the Maya, and conquer Spain, the Franks, and England in succession... Watch as my Zhuge repeating crossbows overcome every obstacle and unify the world!