Idle Defense Achievements Here is the full list of all 5 Idle Defense 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 Tier 1Complete the first difficulty tier Tier 2Complete the second difficulty tier Tier 3Complete the third difficulty tier Tier 4Complete the fourth difficulty tier Tier 5Complete the fifth difficulty tier