When you get down the elevator in End Of The Road, the tyrant will jump down from the ceiling. This is able to be dodged, but you will most likely get hit. You can get by him by shooting him with the pistol 4 times and run through him, this is a sort of "glitch/bug". If you play as Alyssa, you should be able to perform a backstep dodge to avoid being hit.
In Elimination 3, find as much ammo as you can for the last 3 tyrants, the first 2 are two of the tyrants. The revolver, magnum, grenade launcher, or even the shotgun is the best against these two. The last one is much harder to kill than a normal evolved Tyrant R.