It works! I just upgraded my gaming rig with a SSD and Windows 8. Installing all the games turned out to be the most difficult part of the process. Some games, that are not that old, will not install properly. WWI did. It could have gone a bit more easily with WW1 but the various updates and installation files (dating to the initial release in '08) were spread around on different drives, computers and disks. It took a few tries to get the right combination, but succeeded in the end. Although the Gold version is obviously playing, the version number is "fubar". I may break down and just buy the Gold version.
The game runs better than ever--perhaps Calvinus was ahead of his time .
BTW, I would not recommend Windows 8 at this time. It is quite different-and in some ways, improved. However, the loss of a bunch of good games makes it of dubious value to a gamer. The new SSD hard drives are great-if still a bit pricey.