They're All Dead, So I'll Be This Gun

【Lone-wolf female lead + no romance, no male lead + thrilling gunfights + one-woman battlefield + tactical combat + satisfying martial arts】 On the day the madness invaded, humanity lost to itself. Humans became slaves to the madness. Ordinary people became mad corpses; The kindhearted became impostors; Those with strong wills became madmen with supernatural powers; Children became monsters; Not a single living person remained. Except me. I'm Hei Feng, a human-shaped gunner brought to life in this world from game data. The madness has no effect on me. Now I have only one thing to do. I nudged up my black-rimmed glasses and said gently, “Battlefield analysis complete.” The next second, a gun took shape in my hand. I loaded it, took aim, and fired. Drag the impostors wearing human skin out of their disguises. Send the power-crazed lunatics who proclaim themselves rulers of the new world where they belong. One pull of the trigger, one debt settled. I pass no judgment and offer no reason. I can only grant them peace. Bullets are my elegies. My gun leaves no vengeful spirits behind. Humanity is dead. I'm here to lay this madness to rest. Absolutely rational heroine + gentle voice delivering the harshest words + one push of her glasses, and she starts killing Realistic gunfights + professional-grade weapon handling + reloading, checking guns, and CQB all stand up to scrutiny Kill-to-grow system + kill enemies → bodies disappear → abilities upgrade + the more she kills, the stronger she gets, with a clear progression A world dominated by madness + all humanity gone mad + only the heroine remains sane + overwhelming, one-sided combat Impostor twist + the kinder someone was in life, the more twisted they become after death + every humanoid monster has a story worth killing for An orange cat companion + mascot that never holds her back + the apocalypse's only touch of warmth