Metroid

After finding Mother Brain, you have to destroy it and get off the planet as fast as you can before the base explodes...

You are congratulated on your success, and the biggest shocker in old school gaming unfolds when Samus' suit flickers to reveal that...

Samus was actually a WOMAN when everyone had assumed she was a robot, or even a man. And if you accomplished some necessary requirements in the game, she took off more than just her helmet...

Like her entire suit when you beat the game the first time...

Then her one-piece suit the second time you beat the game. Sorry folks, that's as far as it goes.