Boomer Grandma Achievements Here is the full list of all 9 Boomer Grandma 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 HellhoundDefeat the boss on Level 5. Corporate WarriorDefeat the boss on Level 10. NightmareDefeat the boss on Level 15. Fat DragonDefeat the boss on Level 20. Demon KingDefeat the final boss on Level 25. Perfect VictoryEarn a perfect score of 200 on every level. Secret CollectorCollect all secrets. Well DoneEarn a score of 100 or higher on every level. GreatJobEarn a score of 150 or higher on every level.