Clicking on the "50% off Holiday Sale" banner on the front page brings you to a colorful page where you can (supposedly) click and see ALL the games that are on sale. This is currently not the case.

For example, Arcanum is on sale, but it doesn't show up under the "All genres" section even when you click the "Show more deals" button until there are no more to display. Neither is Arcanum shown on the Role-Playing genre list... very strange.

Oddly, there is no genre link for "Racing & Sports" genre on the sale page, but for example "Driver Parallel Lines" is on sale, and you will only see it if you keep clicking the "Show more deals" from the All Genres section.

There are still 7 games on my Wishlist that are missing from the Holiday Sales pages. I haven't reconciled them all yet. Be sure to look explicitly at a game page before you assume it's not on sale, because it just might be after all!

Yep, there are some glitches on the site linked with newest promo.

But you may access each game from games catalogue list and buy it from there.

It's still confusing, though.

Mmm! I didn't buy it in my first round of stuff... But then looked at it again, and found it WAS on special too!

I returned for zork, centuri and of course vampire

Looks like GOG updated the master Sale list with a few more of the missing games. Arcanum was added, as was all the King's Quest games, the Police Quest games, Caesar 3, and Vampire the Masquerade.

Still missing from the "master list"... most of the Racing & Sports games. But those games ARE on sale. Just pretend this is "Ultima 0" and you have to manually click on each and every game to see whether it's on sale or not!

User sbenrap made a very helpful GOG mix for this. If it's not listed then it's on sale:

http://www.gog.com/en/mix/games_that_are_not_in_the_2011_xmas_sale

Whoa, what the...???

I was just going to post that GOG *fixed* all the missing games from their Holiday Sale list, including adding the missing Racing/Sports category! That was about 30 minutes ago.

Now... the Sports category is gone again! Maybe they're "playing" with it and it will return? Anyway, what I saw (briefly) is the Sports category (at the end of the list to the right of "Action") also includes the racing games like Driver Parallel Lines. Hope they bring it back for all the new GOG members to see!

It's there, but it sounds like you've zoomed the text. Try hitting Ctrl+0 to reset the text size.

Thanks, it is there (now) through all zoom levels on my browser, so I don't think that was the problem, but strange things do happen. The games were truly missing yesterday... they didn't show in the "All games" or "All genres" category even if you tried to search on their names. The good thing is,,, they're there now!

I hadn't noticed them being completely gone, but like you said, at least they're there now. :)

Why these games not on sale?

I believe the confusion is due to the fact that games you already own are not shown on that list, so people may (erroneously) report them as missing from that page.
On the other hand, when I cross-checked the list, the only games missing from the promo page are those not on sale.

The issue was genuine. But it seems to be fixed now.