I remember when Bioshock first came out in 2007. While I didn't play it when it first debuted, I remember the amount of buzz surrounding it, and the talk of it changing the face of video games for better.
Despite all that buzz, I didn't play it until a while after it's release: partly because I'm not as up to date on gaming as others, partly because I didn't have the system to play it.
That all changed when I was finally had a 360 to play it on, and when I saw it at Target for only about $20 (which is a steal, considering how obnoxiously priced video games are now...). I picked it up more than anything because of it's price, and because I had heard good things about.