» Sun Dec 11, 2011 7:59 pm
Caesar dying doesn't change the end of the game because the Legate is the one who leads the attack on the damn. There are a few characters who will discuss it with you; like Boone, who if you bring him with you to kill Caesar will seem impressed and thank you. A couple other characters will make comments, and you can get some snarky banter at the end of the game with the Legate if you've killed Caesar. (For bonus points, wear Caesar's Armor when going to the Legate).
In the new DLC, the Burned Man, Joshua Gram has a unique dialogue option if you've killed Caesar, where he mulls over it then thanks you.
The "real" effect of killing Caesar is that regardless of the result of Hoover Dam, the Legion is going to fall apart, since anyone who paid attention to the story, or who knows anything about sociology/psychology knows that Caesar is essentially the only thing holding the Legion together, and that removing him basically like tearing the spine out of the Legion.