This achievement cannot be obtained in Solo and can only be obtained in Duos or Squads mode. When a player's health has been fully depleted in Duos or Squads, they will go into a knocked out state instead of instantly dying, which is what happens in Solo. When this happens, their teammates have the ability to revive them. To revive a teammate, walk up to them while they're knocked out, and press
to start the revive. Reviving has a cast time of 10 seconds, and if you or your incapacitated teammate move, it will interrupt/cancel the revive. Be sure that you and your teammate are in a safe and secluded spot before going for a revive.
This achievement will come naturally just playing the game, but if you're looking to get it quickly, either have your teammate purposely incapacitate themself with fall damage, vehicle damage, or a grenade, or you can down your teammate yourself with friendly fire and pick them up right after (the latter is actually how I unlocked the achievement, so I can confirm that this method works.)
Enjoy the relatively easy 10G!