Here is the full list of all 17 Lost Love Island achievements.
See the True Ending
See the Bad Ending
See the Happy Ending
See the Bob Route Ending
See the Luke Route Ending
See the Jeff Route Ending
See the Salim Route Ending
See the Karina Route Ending
See the True? Ending
Found Wilson
Make a bonfire
Make a stone ax
Make a pickaxe
Make an Ether
Finished the game once
Line up all the items at the Base
Start the game