The problem with this thread is that SteamSpy tracks owners, not sales. Skyrim, for example, just had a free weekend, making every user that logged in on that weeked an owner until they logged on after that weekend. You can see it from the graph on SteamSpy: It's about 8.6 million just before last weekend, then sharply rises to about 30 million, after which there's a slow decline. Thus the real number of sales for Skyrim is probably somewhere between 8 and 9 million.
That said, this thread's point is still valid. PC games can sell extremely well. If the numbers for Skyrim really are between 8 and 9 million, it has sold about the same as the X360 version - which is more than the PS3 version. That is, the PC version is the platform with the most sales for the game, together with Xbox 360.







