You've had the option of playing X-Wing and TIE Fighter (aka some of the finest Star Wars games ever) on modern PCs for a while, but let's face it: you've been waiting to buy them on Steam, haven't you? If so, you now have your chance. X-Wing, TIE Fighter, X-Wing vs. TIE Fighter and X-Wing Alliance have reached Valve's store, complete with their expansion packs. In the case of the first two spaceflight titles, you even have your choice of playing the DOS-based originals or their Windows re-releases. They normally cost $10 each ($30 as part of a bundle), but a promo will knock 10 percent off the price if you pick any of them up by May 7th.