Here is the full list of all 20 Survival: Fountain of Youth Playtest achievements.
Faint 10 times
Survive the shipwreck
Spend 2 hours in game
Spend 10 hours in game
Faint for the first time
Unlock 20 recipes
Unlock 50 recipes
Find a Сlay Piece
Find an Obsidian Shard
Find a Sea Resources
Catch a fish
Build a Kiln
Build a Cart for transporting
Build a Water Collector
Build a Chemistry Workbench
Craft a bow
Craft a Spear
Kill a Boar
Kill a Turtle
Kill a Jackal