I am still very early in the game. In the NCR Nipton quest, I was very displeased with the fact that the Legion wiped out the town, so I did what the leader dared me to do, I did something about it. Then, I got a quest to head east and save a few more Powder Gangers from the Legion. There's no love between me and the Powder Gangers, but the Legion's tactics are brutal and unjust, so naturally I took on the quest and went to rescue the captives. I managed to take out the Legion's guys at that without too much difficulty, and then continued on with my game. Some time later, I found myself traveling through this area again to get to the town of Nacon, only to be attacked by a group of five Legion Assassin's. These guys weren't just tough... I would imagine that they'd give my Level 30 Vault 101 Dweller from Fallout 3 a run for his money (mind you, in New Vegas I am about level 7). I managed to headshot one to death with my trusty Cowboy Repeater, and then was instantly mowed down by the remaining Legion Assassins. Well that svcked, so I reload the game and try again with slightly different tactics, only to die even faster. Then I reloaded and tried to outrun them, also impossible since they run faster than you and can hit you from (seemingly) a mile away once they turn aggressive. Then I discovered that if I stayed off the main road, they didn't seem to appear, but if I ever ventured into the main path, I was toast. Well somehow I made it through all that to Nacon, where, once I started to complete some of the quests I had racked up, who shows up but, you guessed it, the Legion Assassins. I tried every trick in the book I could think of to beat these guys, including laying down mines and powder charges. They just shrugged off everything I threw at them and kept coming. After about a dozen failed attempts to outfight/outmaneuver/outrun these Terminators, I decided to look back and see if I had a save I could revert to before I made the Legion hate me. Fortunately, I had one save left... otherwise I would have had to start over completely. As it was, I lost several hours of gameplay and exploration that will have to be done over. Sorry guys but this is not cool. Difficult is cool... making it impossible to continue the game is not cool and not fun. The difficulty of these Assassins needs to be patched somehow to scale to player level.