I don't know about you, but I'd think that the imminent destruction of all existence would be a pretty powerful motivator to get me to go out and do something, ANYTHING, to try to stop it.WeepingAngels said:*SNIP*
So that's why our heroes don't stop. They know what's at stake, and they fight on because they know that they're just as likely to die as any of us if the villain has their way. They choose to fight because they know that THEIR LIVES are on the line too.
And perhaps we play into that. The rising hope that the heroes will succeed. As such, have the party steadily grow as the story progresses, and show greater numbers of allied troopers fighting at the heroes' side as the story reaches its peak. The final ultimate battle will be two massive armies battling against each other, as the heroes lead the charge, fighting their way into the villain's chambers.
And when it comes down to it, only the player's party survives to meet the villain. But the sacrifices of those brave allied soldiers further empowers the heroes, to strike down the evil once and for all.