Backseat Driver Achievement
GTA Online: Direct a driver to 1st place as co-driver in Rally Mode.
Rally Mode Races can be launched through the regular Land Races that are found around Los Santos. When you enter the blue circle of the Race start, a Settings Menu will immediately drop down. Change the "Race Type" to Rally Mode and now invite your partner(s). Take note that the Rally Mode Race can only begin if there is an even amount of players in the lobby.
In the "Settings Menu", assign your partner to the "Preferred Driver" and select which role you would like to be, whether it is Driver or Co-Driver. The Driver - obviously - will maneuver the vehicle throughout the race but will not be able to see the checkpoints. It is up to the Co-Driver to direct the Driver throughout the course as only they are able to see the checkpoints.
Communication is KEY while going for this achievement. If your Co-Driver is not giving you precise directions, the Driver will have no idea where to go. Once your Driver has crossed the finished line in first place, whoever is taking the role of the Co-Driver will unlock the achievement.