What was the most Shocking Twist in an RPG for you? (spoilers obviously)

[the_bloodwalker]

Baten Kaitos: Mizuti is a girl

Diablo: After defeating Diable you take the Soulstone and put it on yourself and thus become Diablo.

Grandia II: Lord Granas(analogy of god) is actually dead

Grandia: Leene and Fina are sisters