MAX-russia has written
You know, its so had to make a singleplayer shooter mod for Stranded II because there is no special behaviour for npc soldiers, tanks and something like that.Thats why I freeze my Strong combat mod for Stranded II.But you can edit the source code, which requires you pay 100$ or you can just download it for free.
You don't need to edit the source code. You can edit maps to make the soldiers stay and when inrange they'll attack you. Nothing really hard, you just have to know some basic script for that.
And man, if you need some help with scripts just contact me and I'll try to help you.