You Know, Don't You? (Spoiler)

In "Final Fantasy X," summoners journey to get the Final Aeon, but upon summoning, the Final Aeon kills them. As the player, you don't know this throughout most of the game, though there a fair few hints dropped for the attentive player. There's somebody else who doesn't know either - your main player character, Tidus. He comes from a thousand years in the past and to say he does not take the news well is an understatement.

Example of:
The Reveal