Lesson Learned Achievements Here is the full list of all 24 Lesson Learned 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 lessonComplete the tutorial. LockedSecond lessonSurvive the first wave. LockedLucyDefeat Lucy. LockedTutankhamunDefeat Tutankhamun. LockedGaius Julius CaesarDefeat Gaius Julius Caesar. LockedPope Innocent IIIDefeat Pope Innocent III. LockedNapoleon BonaparteDefeat Napoleon Bonaparte. LockedPrickerBuild your first Pricker. LockedBoomerBuild your first Boomer. LockedSpitterBuild your first Spitter. LockedTeslaBuild your first Tesla. LockedHammerBuild your first Hammer. LockedDragonBuild your first Dragon. LockedLevel UPLevel up your tower. LockedUpgradeBuy your first upgrade LockedFIrst gradeDefeat your first 10 monsters. LockedSecond gradeDefeat your first 50 monsters. LockedThird gradeDefeat your first 100 monsters. LockedFourth gradeDefeat your first 500 monsters. LockedFifth gradeDefeat your first 1000 monsters. LockedBuilder apprenticeBuild your first 10 towers. LockedBuilder journeymanBuild your first 50 towers. LockedBuilder masterBuild your first 100 towers. LockedWinston ChurchillDefeat Winston Churchill. Locked