Retronaut Playtest Achievements Here is the full list of all 10 Retronaut Playtest 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 Boss KillKill a boss for the first time. TankTake 100000 damage in a single run Boss HunterDefeat 50 bosses Level UpReach player level 100 Artifact CollectorCollect 100 artifacts Kill StreakKill 250 enemies without taking damage SurvivorSurvive for 30 minutes Weapon MasterReach level 40 with any weapon Uber Boss SlayerWinner? Uber Boss Slayer 2Congrats?