This achievement requires you to complete "The Jewel Store Job".
The Jewel Store Job can be done in any way the "Smart" approach or the "Loud" approach. I will cover them both.
This mission can only be started as Michael. When you start it, a cutscene begins.
Smart ApproachIf you chose the "Smart" approach, then after the cutscene, you will need to get in the car with Franklin and ride him to the jewelry store where he will climb the building and throw some gas grenades in the ventilation system. This knocks everyone in the store out. You switch to Michael and you have to steal as many diamonds as you can from the shop before the time runs out and the alarm rings. When time runs out, you want to escape the jewelry shop and ride on the motorcycle and follow your crew. Make sure you take your time when you are following them as if you fall off your motorcycle, you are most likely going to fail the mission. Once you make it out onto the LA River, you will be switched to Michael in which you are meant to ram into the cops trailing the motorcycles, if you don't do it in enough time, then you will fail the mission. When you are in the clear, you have to drive the motorcycle into the truck as Franklin. Once you do, you switch to Michael to drive the truck towards the lockup to finally get a cutscene to finish the mission.
NOTE: IF YOU DIDN'T UNLOCK THIS ACHIEVEMENT WHEN YOU COMPLETED THE MISSION THEN REPLAY THE MISSION VIA THE "GAME" TAB.
Here is the video guide.
Credits for the video to GTA Series Videos (
https://www.youtube.com/channel/UCuWcjpKbIDAbZfHoru1toFg )
Loud ApproachIf you chose the "Loud" approach, then after the cutscene, you will want to get in the van with the crew and drive to the jewelry store. You switch to Michael and you have to steal as many diamonds as you can from the shop before the time runs out and the alarm rings. When time runs out, you want to escape the jewelry shop and ride on the motorcycle and follow your crew. Make sure you take your time when you are following them as if you fall off your motorcycle, you are most likely going to fail the mission. Once you make it out onto the LA River, you will be switched to Michael in which you are meant to ram into the cops trailing the motorcycles, if you don't do it in enough time, then you will fail the mission. When you are in the clear, you have to drive the motorcycle into the truck as Franklin. Once you do, you switch to Michael to drive the truck towards the lockup to finally get a cutscene to finish the mission.
NOTE: IF YOU DIDN'T UNLOCK THIS ACHIEVEMENT WHEN YOU COMPLETED THE MISSION THEN REPLAY THE MISSION VIA THE "GAME" TAB.
Here is the video guide.
Credits to the video to GTA Series Videos (
https://www.youtube.com/channel/UCuWcjpKbIDAbZfHoru1toFg )