|The following is based on Van Buren and is not canon.|
Using enough explosives in the right locations, you could seal shut each of the cave entrances. Not only would that force anyone inside to die of suffocation, it would piss off the Blackfoot to no end, since you've closed off much of their supplies and their ability to make new metal out of scrap.
Character type completion breakdown
- ScienceBoy - Can make the explosives.
- StealthBoy - Is the master of setting traps, which is what these are.
Once two of them collapse the tribals are aware something is up and they'll suspect it's you.