I'm in Detective Conan, and I start with the Grand Theft Auto system.

Lin Shen transmigrates into the world of Detective Conan, and upon waking up, finds himself involved in a billion-dollar bank robbery.
He panicked terribly!
He's just an ordinary person; he'd never done anything like this before! Besides, this mission is a complete trap!!
Just as Lin Shen was about to run away, a "ding" sounded, and the [Grand Theft Auto System] successfully loaded!
Lin Shen opened it and took a closer look, and he was stunned. There were all kinds of weapons, from light weapons to heavy weapons, and even various tanks, cannons, and medium- and long-range intercontinental ballistic missiles!
Unfortunately, he's penniless now and can't exchange for anything, so he can only use the beginner's pistol that the system gave him.
In a fit of anger, he typed in 【NUTTERTOOLS】!
To Lin Shen's surprise, he had actually gotten a bunch of professional-grade weapons for free!
Looking at the Gatling gun in his hand... he realized that he seemed to have everything he needed!