I just bought Doom 3 and its expansion pack on Steam. With a discount of 50% off, it came to a measly $15. I suppose I could have gotten it a little bit cheaper through retail bargain bins (or not... I don't feel like even checking the price), but why do that when I can have it handily on my Steam games list and get it without too much of a wait.

It's downloading now, so I guess I know what I'll be playing for the next few weeks.