Purgatory Overkill Achievements Here is the full list of all 13 Purgatory Overkill 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 blood ! Multi-kill !Kill 10 enemy in one single session. Killing spree !Kill 100 enemies in one single session. Do you need a hand ? Welcome ! The naked gunEnd a wave without using any weapon. OLD SCHOOLEnd a wave without using any turret. Build up !Upgrade a turret to its max level. Mega-kill !You have killed more than 1000 enemies total. The Cave Boss Maximum power !You upgraded a power to its max level. The Orc Leader The Insect Boss