Martin Madrazo and Gang Attacks

Following your unlocking of the previous actions and job types in the game you will get a call from another character from the story-mode -- Martin Madrazo -- the "businessman" (gangster) whose wife Trevor appropriates as part of his story in the game.

Madrazo introduces himself to you during the call, which will come from a phone number with no name -- explaining his "business" to you, and unlocking the Gang Attacks activity/job on your map.

Gang Attacks are Event areas that you encounter on the map -- small red-shaded areas that you can enter and engage in gang combat. Among other things these are a source for rewards and packages.

There is an Achievement that is associated with these Events: "Clean Sweep" (10G) GTA online: Finish a Gang Attack without dying and kill at least 10 enemies.

Gang Attacks can be a fun Event for you to seek out - particularly with your Crew members.