The Legendary Mechanic manhua
Han Xiao, a veteran player of 《Star Ocean》, unexpectedly dies whilst boosting an account. Somehow, he gets isekaied into the 《Star Ocean》game world from over a decade ago, and became an NPC with a player interface.
To escape from being thrown into the middle of a terrorist organization, Han Xiao picked the profession “Mechanic” and trained diligenty. He swore to use his unparalleled knowledge of 《Star Ocean》’s universe to raise a mechanical army, defeat the villains, and gradually work his way up from the bottom to become the Ultimate King.