You can download the playable demo from Xbox Marketplace right now (it might take a while - everyone's downloading it) and the game is due to launch for 360 and PC on August 24. So far it's scoring incredibly well; OXM, PC Zone and PC Gamer each gave it a huge score.
But according to senior designer Joe McDonagh many publishers turned their noses up at the title when it was initially being pitched around.
Speaking to CVG about his role in its conception and development, McDonagh said, "Bioshock was a long time in the making. Ever since System Shock II the team had talked about everything they wished they'd done differently.
"Ken (Levine) spent years pitching the game to publishers but no one was interested, incredible as that seems now. I joined Irrational in December 2004 and my first job was to get a publishing deal for the game (I worked as the Business Development Director for the first six months). I remember pitching the game to one publisher who later told a friend of mine that it was 'just another fucking PC FPS that's going to sell 250,000 units.'
"This sort of attitude really pissed me off. System Shock II, for all its critical success, didn't sell very well which turned buyers off. Something I realised very quickly was that as much as your boss won't ever know that you turned down a future game of the year, he will know that you signed up a turkey. You don't get fired for not taking risks. That kind of mentality is driving the industry into a creative cul de sac."
Look out for our awesome Creative Minds interview with McDonagh later this week.