Here is the full list of all 24 Tiny Atolls achievements.
Place your 10 first tiles.
Have a rail network span over 60 tiles.
Place a tile earning you 13 points.
Have a score above 1000.
Have a score above 2000.
Have a score above 5000.
Place over 5000 tiles over multiple games.
H-How ?
Complete your first combo.
Complete your first secret combo.
Complete over a 100 quests over multiple games.
Discover a new island.
Complete a Windmill combo.
Complete a Camp combo.
Complete a Rural Home combo.
Complete a Bell Road combo.
Complete a Vineyard combo.
Complete a Olive combo.
Complete a Green Fields combo.
Complete a Coffee Shop combo.
Complete a Mountain Lodge combo.
Complete a Mountain Resort combo.
Complete a Pizzeria Combo.
Complete a Filter Station combo.