Slime Adventure Legacy Achievements Here is the full list of all 6 Slime Adventure Legacy 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 NewbieComplete 5 levels. AmateurComplete 10 levels. ExpertComplete 15 levels. ProComplete 20 levels. A LegendComplete the game. ElegantBuy skin.