RE: Whose the good guys in broken hills
Play Fallout 1. There's a great story behind the mutants origin.
The "chemical" you say is virus and it's called FEV. FEV has nothing to do with the cave murder. Speak to the head mutant miner(don't remember his name)and show him the note you found in one of dead at the cave, he'll direct you to Francis - the guy who wants to armwrestle. Show him the note you found. I preffered not to kill him - at least his honorable, but it's up to you.
The humans are trying to get rid of all the mutants in the city.
The mutants are trying to leave peacefully in harmony with other species. It's your choice who you will help.
reid