I'll tell you that stright away: If you want to do something even semi-comparable to Battlefield games, its impossible in fpsc
You can do allies and enemies fighting with each other, but only on small scale. You can set up some small and fun combat scenes using "Dark AI" scripts, but you would never get even close to "Battlefield" series. And all that Dark AI inteligence comes with a price: you will notice fps drop in your game - the more characters with Dark Al fighting at once - the more your fps will drop. FpsC engine just can't handle too much active scripts at once
And, of course your combat arena will be A LOT smaller than maps in Battlefield
You need to know, that you're not the first guy trying to recreate your favourite AAA game on this engine
Many tried (and failed) before
But don't give up, I'm just warning you to spare you a lot of time and frustration
You can create good game on this engine, but not comparable to big-budget AAA titles
Try some games from the forum Showcase to see what is possible
And look at this YT video, I think this is the closest FpsC got to BF series ever
