Urban Mercenaries & Mango Merchants. A group of ass-kickers slightly crazier than FSK405 & almost as crazy as 6th Floor. ... In coordination with 6th Floor and FSK405, Um3 (as part of the UrT Triumvirate) intends to rule the world with an iron fist, and make 3 hours per day of 'Urban Terror' gaming mandatory for those over the age of 18.