Happy Nuclear Achievements Here is the full list of all 7 Happy Nuclear 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 Chapter 1 DoneChapter 1 Done Chapter 2 DoneChapter 2 Done Chapter 3 DoneChapter 3 Done Chapter 4 DoneChapter 4 Done Chapter 5 DoneChapter 5 Done Chapter 6 DoneChapter 6 Done Finish The TutorialFinish The Tutorial