While you've been enjoying the downloadable Bioshock demo game critics around the world have been playing the real deal. They seem to like it, too - check out these high scores:

IGN - 9.7/10

There is art here...It's in the way the narrative is structured, and the way it blends so seamlessly with the action. Irrational...didn't just deliver something that's fun to play...This is an essential gaming experience.

1UP - 10/10

...taken as a whole, as an experience that's richly and utterly complete, and one that engages the player in a constant dialogue, BioShock is virtually unassailable.

GameSpy - 5/5

Put simply, BioShock is an unparalleled achievement. It may still be too early to name a Game of the Year, but after experiencing BioShock in all of its Haunting artistic glory, every other game will have to try that much harder to even be considered as a candidate.

You'll be able to nab a copy for yourself on August 21st.