Recently, I played the Predator campaign in the new AvP game in Nightmare difficulty. It's just like Hard, except you get no save points. The last boss battle against the Predalien is a *****, as the stage keeps collapsing into lava all around you.
Finally, after a few attempts, I manage to dwindle the Predalien down to its last shred of life, and fire off the killing blast with the Plasma Caster. It kills him, just as I miss a jump and I fall into the lava...
But the final cutscene starts! For a split second I thought I'd won, but in the beggining of the in-game cutscene my character finishes his death drop, and I'm booted to the beggining of the level.
That was frustrating, all the worse for the little sprinkle of hope they gave me.