As first seen by me at SimStop this week we see X-Plane is now available via Steam. This is a sensible move from the Laminar guys, the product has always been up against the popularity of the MS franchise and anything that gets X-Plane in front of new eye-balls is a good thing. Be interesting to see how DLC will work and if other 3rd party tools will continue to work with the Steam delivered version.

X-Plane 10, the modern 64-bit desktop flight simulator from Laminar Research, creators of the X-Plane franchise, has made its debut as a digital download on the popular Steam platform. On the first day of its release X-Plane skyrocketed to the number seven spot on the Top-Seller list in Steams USA store and to number five in the German Steam store. X-Plane 10 was recently green-lighted by Steam and also received top-ratings when voted on by Steam users for consideration for inclusion in their product offerings.

see the Simstop article