Knife

The Knife is a weapon in GTA: San Andreas and Grand Theft Auto IV. It takes up the "melee" weapon slot.

San Andreas

Usually it can be found on prostitutes near CJ's home or during a mission when CJ needs to steal Madd Dogg's rhyme book. CJ gets a knife also in the mission The Da Nang Thang when his chopper goes down and he looses his other weapons. Knife is more than just a simple melee weapon, if CJ sneaks behind someone and they don't notice him, he will execute a stealth kill, slitting the victim's throat. Useful when the player is trying to avoid detection and doesn't have a Silenced 9mm. The knife only produces one wanted star when used to stealth kill a police officer.

Liberty City

The Knife can be purchased at a back alley weapon store for $ amount of dollars. It is more powerful than attacking with your hands, and most enemies can be killed with a few slashes. You even stab enemies when they're on the ground.