For this weekend only, you can grab the PC version of Call of Duty 4: Modern Warfare on Steam for 40% off
Don't bother buying it. If you haven't played Call of Duty 4: Modern Warfare yet, play it on consoles instead. It's not that the PC version isn't as good, it's just that... well... you might as well get used to the Xbox or PS3 controller. I mean, you're going to get angry and boycott the PC version anyway, so, I mean, why bother? Sure, the 40% sale cuts the price to a nice $23.99, but... ah, screw it, that's a nice sale. Buy it! BUY IT!