Here is the full list of all 52 Wet Sand achievements.
Go to the depths with the Sea Maiden
Complete Benno's quest
Get to know the other side of the elf girl
Complete Olivia's quest
Get a thank you from Olivia
Make a deal with the basement dweller
Take over the town for Cathal
Get a thank you from Cathal and Lauren
Touch Dolores' breasts
Save Dolores from death
Defeat Anna in fencing
Help Leephi escape punishment and get a commendation
Convince Sorna to spare you
Stay within a hair's breadth of death
Find out who poisoned Brand
Let Lauren please you
Learn from Tovenaar about the history of the world
Don't lie once during your time on the island
Meet a cave dweller
Finish the maze in any way
Draw Miss Brown
See Benno's beauty
Win for the first time in the "Tailwind"
Follow the Elf
Spend the evening with Aquanite
Bring Bill a bag of guano
Find out a little secret
Kiss Olivia
Meet Tovenaar
Find out Olivia's secret
Choose chat with Nadia instead of brothel services
Learn how to sail the ship by proving it to Lauren
Guess the cards in the game with Olivia
Complete the Prologue
Being a prisoner on the ship, ask Bill all the questions
Disable NSFW content
Spank a girl
Beat Anna in shooting without misses
Correctly answer all the tavern keeper questions without reading the code
Finish the first chapter with a good relationship with all your crew
Get to know Anna better
Don't tell the crew that you're not alone on the island
Make the right choice in the game with Anna
Pick the same girl during the last night out and who to sleep with on the beach
Take advantage of the moment
Get a reward for the stuff
Get the maximum amount of money from the merchant
Find Benno and comfort the girl
Spend the night with Benno
Calm Anna
Give the elf girl an item from the caves
Give the hat to whoever is chosen as the romantic interest on the island