so i was going for my 33rd newvegas trophie - 10,000 damage with explosives- and i was serching around sloan for death claws because i needed to kill 4 more death claws to get the trophy i went into the work sight and found two remaining deathclaws, a normal one and an alphamale, i killed the normal one with my grenade minigun and started fireing at the alphamale, it didnt move his hp bar, i tryed in vats to no affect so i died, i tryed around 6 more time, each time i died so i left the work sight and started heading to vegas and found a two normals and a young one died but the others were invincible, i died by them a couple times, so i went to sea side resortes to kill some lakelurks, 2 died and i had 4 that wouldent die chaseing me in the water, i finaly out ran themand went to a powder ganger place got chased by two mole rats, a pup and a normal one. i killed the pup but the big one wouldent die , so then i rand to the powdergangers and killed them two quick got the trophy and got chased by the molerat.... anybody having these problems?