Mermaid Colony Achievements Here is the full list of all 12 Mermaid Colony achievements.Filter Achievement View View Image viewList view Sort by TrueSteamAchievement desc TrueSteamAchievement asc Achievement name desc Achievement name asc TSA Ratio desc TSA Ratio asc Gamers desc Gamers asc Steam order Date won desc Date won asc What are achievement flags? Click to find outApply 10 MermaidsA colony with 10 mermaids 20 MermaidsA colony with 20 mermaids 30 MermaidsA colony with 30 mermaids 40 MermaidsA colony with 40 mermaids 50 MermaidsA colony with 50 mermaids Win the GameUse the final spell Full HouseA cluster of 5 dwellings with 10 mermaids Into the TrashDestroy items in a storehouse Clean-up CrewDestroy all ruins Sitting on a FortuneStore 20 gems in your throne It Sure is HotPlant next to a hydrothermal vent Ask a GhostAsk dead Episteme for help