Here is the full list of all 16 Pineapple on pizza achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Get out of the island.
Jump from the cliff.
Approach the cliff.
Approach the baby.
Approach the kids playing.
Approach the turtle.
Approach the man feeding the birds.
Walk through the corn plantations.
Ruin the limbo.
Approach the statue.
Step onto a sailboat.
Activate the volcano.
Step inside the circle.
Approach the skilled dancer.
Approach the bench.
Play.