Crystal Keeper Achievements Here is the full list of all 12 Crystal Keeper 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 BloodSurvive your first wave Getting Warmed UpReach Wave 5 and unlock your first upgrade Crystal GuardianDefend the crystals through Wave 10 Seasoned DefenderSurvive until Wave 15 Unstoppable ForceReach the legendary Wave 20 Upgrade MasterFully upgrade any ability to Tier III Crystal HoarderAccumulate 10,000 crystals at once Turret CommanderHave 2 turrets active simultaneously Perfect DefenseComplete any 5 consecutive waves without taking wall damage Skill SynergyActivate 3 different skills within 10 seconds Elite DefenderSurvive the onslaught to Wave 30 Master GuardianAchieve the ultimate defense at Wave 40