Have a total of 500 weekly guests stay at hotels. - Cities: Skylines
Kill 15 aliens with the monster truck - Duke Nukem Forever
Use a Holoduke in SP - Duke Nukem Forever
12,822/13,6552,630/2,710120/122
751/2,531515/1,20530/60
4,425/4,4251,400/1,40066/66