Invulnerable

Is there a way to make a unit invulnerable?

Not really.

This function has been removed from OFP to prevent people from using cheats. You can try to use a workaround though.

Setup a looped script that will use the command "setdammage 0" over and over again for a specific unit. If a unit receives damage >= 1 by anything the script will fail though.

So basically there is no real solution to your problem.

Thanks anyway. I guess I'll just have to keep them alive some other way.

If you don´t want to have them targetted use "unitname setcaptive true" in their init.

You can change that later on by using a trigger and use "unitname setcaptive false" in the OnActivation

player addeventhandler ["hit",{player setdammage 0}]

player addeventhandler ["dammaged",{player setdammage 0}]

EDIT: Thanks for correction InqWiper

Less beliefs and more tries. It takes less than 2 minutes to go into OFP and try it. No reason to say you dont think it works. It does work, Ive used it several times. I have never died with those 2 eventhandlers.

But if you get wacked by a headshot, you should stay dead. Right?

Right. So IMHO such commands are meant to be used only for the in-mission cutscenes or something similar; whenever the player needs to stay alive 'at all costs', not in some (serious) mission.