Here is what I would love to have seen happen as an ending: Spoiler You get to Fontaine's office where he is simply sitting at a desk, and he's just this guy in a suit. He launches into a monologue and you watch some scripted action where similar to Ryan you walk up to him and start beating him with your fists, he's just taking it and pleading for his life and then he starts laughing a little and it gets more manic and suddenly he just bursts into flames and your thrown back and off balance, then he uses telekinesis to lift you in the air, while he is swinging you about he'd be telling you how he created you and for what purpose and what he's going to do to rapture. Then he throws you up one last time and you fall to the floor and begin to slip into unconsciousness. All of a sudden a big daddy bursts through a wall and takes him out drilling him to a wall. A little sister appears in your view obviously anxious of Fontaine and injects you with something. Tenenbaum informs you that your body is now operating at 2 times the normal human parameters, and all your plasmids are amped up beyond anything else you've seen. The big daddy meanwhile has lost its battle against Fontaine and gets flung against a wall, lifeless. Cue huge boss fight, far harder and less repetitive than the current one with you being able to suck the Adam out of him at any opportunity you can, with one big meter rather than 4 little ones. So you can freeze him and get the Adam, electrocute him, or wait for him to regenerate. When you finally beat him another cut scene starts, your limping badly and vision is blurred, as you walk away tenenbaum informs you that he's set of some kind of self destruct and that you need to get out, but there isn't enough time, so get into the big daddy suit. As you get to the big daddy you lean over the body and catch a glimpse of your own face in the glass. Your hands come up and wipe the gunk and blood out of your eyes and you see that your female and look very similar to the little sisters, just older. As you open the glass on the front of the big daddy, the face inside is also female and very similar to your own. You get into the suit just as the whole of Fontaine's office dome cracks letting the sea in. Finally, you get a cut scene in tenenbaums office where she finally explains who you were. Then cue the nice ending where all the little sisters are grow'd up. I realise that this would require a re-write of the rest of the story from the start, and obviously you've been grunting with manly noises the whole time, but it would still be cool. I think it would just have been an awesome twist that you were once a little sister. haha, that was fun!