The Los Santos Slayer

"Reach a total kill count of 4,000."

- In-game description

The Los Santos Slayer is an achievement/trophy in Grand Theft Auto: San Andreas.

Acquisition
Simply complete the game to gain kills through the many missions, then takeover as many gang territories as possible on the player's actions. Once these two things are done, there should not be many kills left to gain, so killing pedestrians is acceptable.