Bioshock 2 a prequel?

Just picked up Bioshock 2, loved the first game. Is Bioshock 2 a sequel or prequel? And I know you play as a Big Daddy, so do you constantly have to protect the little sisters?

Not really sure if it's a prequel or a sequel. But yes you will be protecting the littlesisters a lot in this game. It gets a little repetitive but I still enjoyed it for the price I payed for the game.

It's a sequel, set 8 years after the events in the first game, but this time you play as an Alpha series Big Daddy. Excellent game.

Okay, I understand. Thanks!