The Submarines DLC Add-on for Ship Graveyard Simulator has 10 achievements.
Build the tent.
Make $100,000.
Make $1,000,000.
Upgrade the house to the highest level.
Upgrade the Storage shop to the highest level.
Destroy 90% of the submarine Storm.
Destroy 90% of the submarine Hurricane.
Destroy 90% of the submarine Typhoon.
Destroy 90% of the submarine Victor.
Destroy 90% of every submarine.