The Bavarium Sea Heist Add-on for Just Cause 3 has 6 achievements.
Defeat 10 enemies with the same eDEN Spark strike.
Beat the last mission of the Bavarium Sea Heist expansion and complete the story arc.
Defeat 1 enemy helicopter using the eDEN Spark.
Defeat 10 enemy vehicles while in the air with the Rocket Boat.
Defeat 5 enemy helicopters with the Rocket Boat.
Get the Rocket Boat, also known as "The Loochador".