As you may have already heard or read, the kde games stack has recently migrated to the git infrastructure. The new KDE Windows source packages are finally available now by using emerge. The changes will be hopefully available for end users later at the 4.9 release.
I have just skimmed through the build for all the packages by using "emerge kdegames" and there were no build issues which is cool. I do not have time for now to test all the games during the runtime, but I briefly fired up KBreakOut before going to sleep. :-)