Find an underwater ruin.

Complete the entire main campaign on Marksman difficulty

Complete the entire main campaign on Cadet difficulty

Kill an enemy via a booby trap

Complete all OSS Secondary Objectives in the main campaign

100 Kills with a Pistol

Kill 5 Snipers before they see you

Complete 50% of all Secondary Objectives in the Main Campaign

Fully Target Focus 100 times

Get at least one killshot on every organ

Reach character rank 5

Complete a single player mission without using a Medikit or Bandage

GTA Online: You completed Act III of The Doomsday Heist as Leader or Crew.