I'm Really a Proper Gunsmith

Xu Yi, after becoming an NPC in a game, was lucky enough to return to modern times, just as the survival game 'Source - Plan' had just restarted.Wall-climbing, bugging monsters! Infinite skills! Unique job transfer quest! Legendary pet incubator!Having 'free' access to an NPC's experience, there's nothing he doesn't know!When everyone is racking their brains to get high-level job transfer skill books, Xu Yi casually throws a Dominating skill at the resentful BOSS: 'Why do you need to farm skill books?'Relying on the rich combat experience of an NPC, Xu Yi begins his own gaming journey.