Irrational Games may have only unveiled BioShock Infinite a little over a month ago, but it's already shown a somewhat lengthy gameplay session. The trailer has landed at Shacknews and some other sites, but you can watch it over on YouTube, as well—which conveniently lets us embed it here:
The trailer shows a little under 10 minutes of gameplay in BioShock Infinite's floating city of Columbia. It's all about exploration and atmosphere until, about three minutes in, the player picks up a rifle from a barrel... and is immediately attacked by an old man who summons a flock of crows. The rest of the video is very action-packed, with some sections involving sliding around a rollercoaster-like rail system that connects Columbia's different floating islands.
Fans of the original BioShock should feel right at home, since BioShock Infinite seems to have fairly similar core gameplay: exploration, fighting hordes of aggressive enemies, and using various superpowers to do the job. I don't know if it's just me, though, but everything looks just a little bit more cinematic.