Shells Shooter Achievements Here is the full list of all 3 Shells Shooter 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 Stage 20 ClearStage 20 Clear Stage 45 ClearStage 45 Clear Million ShellsMillion Shells