I was looking at my Steam library the other day, and got to wondering, with this basically being a list of every PC game I've purchased in the last 5 years or so...which one was the first?
I'm pretty sure in my case, it was Bioshock. I had really been looking forward to it, but for some reason, the Best Buy near me had sold out, so I decided to give Steam a try. It wasn't my first digital-only game, I'd purchased Neverwinter Nights 2 via Direct2Drive, and had been really unimpressed (can't remember why), but was actually really blown away by how fast and easy Steam was. I don't think I've bought a boxed copy of a game since then.
What's the first game you guys bought on Steam?