Since Doug isn’t doing any windows 8 testing, I’ll start this one for testing since I just completed the upgrade a little while ago (Note: unless stated the test is done on a installation of the game that was done in windows 7 and transferred to windows 8 ).
Moero Downhill Night 2 - Works perfectly with no changes in setting required
Katawa Shoujo - Works perfectly with no changes in setting required
Ever 17 - Works, but takes at least 15 seconds for the initial settings menu to show in desktop mode and the quality issues with the opening video are the same as they were with windows 7
Ai Yori Aoshi - Works with same delay in the initial settings menu as Ever 17, but the quality of the opening video is even worse then it was in windows 7
More tests to be listed once they’re done.