Happy Z-Day Achievements Here is the full list of all 16 Happy Z-Day 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 A Good StartBuild any of buildings in the game. Stronghold IBuild 10 buildings in the game. Stronghold IIBuild 25 buildings in the game. First BloodKill 1 enemies in the game. Slaughter IKill 50 enemies in the game. Slaughter IIKill 250 enemies in the game. Slaughter IIIKill 500 enemies in the game. Survivor I - HouseSurvive 7 nights in the "House" map. Survivor II - HouseSurvive 12 nights in the "House" map. Survivor III - HouseSurvive 17 nights in the "House" map. Survivor I - BarnSurvive 7 nights in the "Barn" map. Survivor II - BarnSurvive 12 nights in the "Barn" map. Survivor III - BarnSurvive 17 nights in the "Barn" map. Survivor I - Roof TopSurvive 7 nights in the "Roof Top" map. Survivor II - Roof TopSurvive 12 nights in the "Roof Top" map. Survivor III - Roof TopSurvive 17 nights in the "Roof Top" map.