User blog comment:D.Ryan/Big Brother Enemy Scorecard and Drawing/@comment-1732397-20100813031723

I think it's kind of cliché to have a scientist control him. What I had in mind was a bit more disturbing. The main antagonist could be his older brother who escaped Rapture as a teenager and got into the civil rights movement. It doesn't end well for him and it cause him to view humanity as a whole that can never be complete unless hatred and anger toward one another is destroyed. He returns to Rapture to find his younger brother trapped in a fantasy world as the Big Brother. Instead of helping him like a good brother would he take advantage of his brother's insanity and uses him to create new Little Sisters. He also uses him to kidnap the form Little Sister that Tenenbaum saved to create new Big Sisters though viscous mental and physical reconditioning. He would then begin to rebuild Rapture(he inherited a huge fortune from his grandparents on the surface)and begin kidnapping people to use as test subject for his moral reconditioning experiments.

The main protagonist could be the Big Brother's mute twin sister who is a rescued Little Sister who was living a normal life with her daughter until Big Brother comes to get you(he doesn't remember you so he thinks your just another target). He captures you, but accidentily kills your daughter. You are turned into a Big Sister, but are killed by the main antagonist in an act of mercy. Big Brother is now haunted by the fact he killed a "Little Sister" and channels what little sanity he has left to rig the Vita-Chambers to bring her back. He is eventually successful and your daughter is brought back to life, but so are you as you share the same genes. You then awaken with two goals. Find your daughter and escape Rapture. The main antagonist quickly takes notice and tries to have you killed out of what he refers to as an act of brotherly love, though he really just wants to use your daughter in his experiments due to her natural immunity to ADAM.

Throughout the game, your encounters with the Big Brother depend on how you treat the Little Sisters. If you save them he will appear late in a level giving you more time to prepare, but if you harvest them he will appear at the beginning of a level thus giving you a harder time. As you remove Little Sister from the ecology and interact with other characters the Big Brother fantasy world slowly begins to crumble and memories of you start coming back to him. Near the end of the game he will refuse to kill you and the main antagonist in an act of desperation kills your daughter in the hope breaking your spirit and as the player would be unaware at this time that their daughter was only recently revived at a Vita-Chamber would give in. The player would then briefly play as the Big Brother, who has now abandoned the suit and weapon, as he find your daughter in a Vita-Chamber and takes her to you. You get to see the world though his eyes during this event. He arrives at your location and begs forgiveness, but because your a mute you cannot respond. At the end of the games final level after defeating the final boss the Big Brother saves you from being crushed and you escape, but not before the final moral choice( save the main antagonist who is your older brother or leave him to die) after that the final cut scene plays out.

If the player was a benevolent to the Little Sisters and moral choice characters the Big Brother will finally be able to face reality and have renewed hope for the future. If the player killed the Little Sisters and moral choice characters the Big Brother will kill you, extract your ADAM, and state that the world is his for the taking and your daughter will be his princess and his older brother will be his eternal prisoner.

That just my idea let me know if you like.