Mystery On Lost Island Achievements Here is the full list of all 13 Mystery On Lost Island 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 First Contact Grasslands The Lab Into The Mountains Pinewoods Blizzard You Escaped The Island! Acacia ValleyYou Unlocked Acacia Valley Wave Survival Map No WeaponComplete Level One Without Picking Up The Pistol LaboratoryYou Unlocked Laboratory Wave Survival Map MountainsYou Unlocked Mountains Wave Survival Map Pinewood ForestYou Unlocked Pinewood Forest Wave Survival Map SummitYou Unlocked Summit Wave Survival Map