A little surprise, you cad download this mod by clicking download button, no links, no parts... Have fun :)
This is total conversion mod based on source engine, genre is action-horror. You play as Serbian soldier veteran from 72 brigade, who fights against SAJ forces and infected creatures. Test version of this mod is released, download it on MixiSoft site. Full version will be released for a few days.
Storyline: At the beginning, you crashed somewhere in Panchevo industry zone (nearby Belgrade). You are only survivor from this crash. You are a Serbian soldier from 72th parachute brigade. You have no idea how to escape from this area. Looking around, you will see a bloody strangers. Later, you will see a special police SAJ units controlled by the goverment, with order ko kill every alive thing. So, you are forced to kill them until you get the command of SAJ units.
This is the first official trailer of TSOTS (SecretOfTheSickness):