Polybius Invaders Achievements Here is the full list of all 13 Polybius Invaders 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 Destroyed 40 Plus UFO'sBonus Level Achievement Destroyed 50 Plus UFO'sBonus Level Achievement PolybiusBonus Level Achievement Defeated 1st BossWe Come in Peace! Shoot to Kill Defeated 2nd BossSmoke me a kipper Defeated 3rd BossTerminated Defeated 4th BossI still aint getting on no plane! Defeated General GooLook at me, I'm the King of the World!! Credits UnlockedDevine Powers granted to you Completed 1st StageIt's not so bad Subliminal's ActivatedLet Me Control Your Mind Infra-Sound ActivatedFeel the Fear Maximum HealthHealth bar is at maximum health