http://www.scoutshonour.com/digital/ (download link included)
Set in the 1988s, the game takes place on a computer hooked up to a cable modem, browsing BBSes trying to solve a vast conspiracy stemming from America's government.
There's much more than that. I just have to leave out the really epic parts so that I don't spoil it for you. The story is REALLY sad, being a romance after all. Seriously. Play it. It's only 30 or so megabytes!
I thought it was really fun. Gets frustrating when you can't figure out which bbs to go to though. :P
Yeah, and then Sprint rescinding your codes is pretty frustrating.
So you finished the game?
That I did. It was nice in the end when Sprint was dead. No stealing my codes anymore. xD