Assassin (achievement)

"Complete a stealth kill."

- In-game description (original version)

"Stealth kill all enemies in the mission "Madd Dogg's Rhymes"."

- In-game description (Definitive Edition)

Assassin is an achievement/trophy in Grand Theft Auto: San Andreas.

Acquisition
Sneak up behind any pedestrian with a Knife, crouch, then press the attack button, and CJ will lean forward and slit the NPC's throat, earning the player the achievement.

In Grand Theft Auto: San Andreas - The Definitive Edition, the player has to stealth kill every single enemy in "Madd Dogg's Rhymes".