The Legendary Mechanic (WN)

Tags: Accelerated Growth, Arms Dealers, Army, Arrogant Characters, Artificial Intelligence, Assassins, Automatons, Average-looking Protagonist, Calm Protagonist, Cautious Protagonist, Character Growth, Cheats, Clever Protagonist, Cosmic Wars, Crafting, Cunning Protagonist, Engineer, Evil Organizations, Fast Learner, Firearms, Futuristic Setting, Game Elements, Gamers, Genetic Modifications, Gunfighters, Hackers, Hiding True Identity, Level System, Lucky Protagonist, Male Protagonist, Mercenaries, Military, Mob Protagonist, Multiple Identities, Narcissistic Protagonist, Nationalism, Outer Space, Reincarnated into a Game World, Ruthless Protagonist, Secret Organizations, Shameless Protagonist, Skill Assimilation, Skill Books, System Administrator, Time Skip, Transmigration, Transported into a Game World, Wars, Weak to Strong