MUSCLE GIANTS Achievements Here is the full list of all 12 MUSCLE GIANTS 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 PlainComplete the Plain Stage. SeaComplete the Sea Stage. SunflowerComplete the Sunflower Stage. SummitComplete the Summit Stage. StageComplete the Stage Stage. GiantComplete the Giant Stage. Yellow Nightmare Green Nightmare Blue Nightmare Red Nightmare Purple Nightmare White Nightmare