Most everything is new stuff. The collections are nice, and now from a recent LSL sale as well as this, I have all of the main Sierra Quest Game Collections which I wanted, but..

As far as I'm aware, it's not advertised as a 'good old games' sale...

As above it isn't advertised as such, there are however many omissions.
Seems to be a fair number of older titles *shrug*

Oh... this thread again...

A cursory scan of the catalogue shows there are currently 461 games on sale that were (according to GOG) released before 2006. (I didn't count the 9 current In Dev titles which also appear in those search results, presumably by virtue of them not having a release date yet.) That does not take into account the various games that are sold in multi-game packs in the store (such as the aforementioned Leisure Suit Larry collection), or the various remasters of old games like Baldur's Gate and Grim Fandango (the likes of which are sometimes listed by the re-release date, not the original one).
According to this, there are some 1,237 total games on sale right now. Assuming we use that arbitrary year of 2006 as the cutoff point for what constitutes "old", around 37% of the games currently on sale -- more than a third -- would qualify as old games. Considering (as has already been mentioned) that GOG currently advertises neither its site, nor this sale, as being focused on old games, that's a pretty damn good percentage.

For the millionth time the question has to be asked, what constitutes a 'good old game'? 3 years old? 5? 10? I bought several games during the sale, and the newest game was Tropico 4 which was released in 2011. Is that an old game? I also got Pirates! and Vampire Bloodlines which were both released in 2004. Are those old games? This good old game thing seems so arbitrary and subjective that it's almost beyond measurement.

Why do you hate new stuff? What did it ever do to you?

They are games too you know. They also want to be loved and played, just like the old games. They might look intimitading on the outside, but inside they are soft and mushy. So if you see a new game alone in a gutter, don't just pass it by. Give it a hand, help it to get back on the track. One day, it may become a good old game too!

GOG stopped being about just old games a while back. And that's a good thing. GOG actually has two main target markets : 1. Those who come here for old games, and 2. Those who come for DRM-free games. Some overlap, others don't. As you said yourself:- ...Is true of many people. If GOG didn't sell new games, then once people reached their own person "saturation point" of owning all the old games they were interested in, there'd be no reason to stay here. It's in GOG's interest to boost customer retention by constantly adding new games as well as old. I'm glad there's a DRM-free store option of many more recent titles, regardless of their age. I think there's a general tendency particular for those of us over the age of 30 to equate "old games" with "only 1990's stuff I grew up with". As you said, 2006-2012 games are just as old today as many 90's games were by the early to mid-2000's, even though people don't see them as the "same kind of old".

There was, at some point, a major shift in the way games were designed and developed. Here are some shifts that have occurred at different points:
*: The use of 3D graphics hardware. (I like to use this as a rough point to distinguish old games and modern games)
*: The use of CD-ROMs for storage of game data (before then, we only had floppies or cartridges; before that, games were stored on cassette tapes)
*: Shifts in genres and genre conventions. For example, in the late 90s, you stopped seeing turn-based WRPGs, and JRPGs started having lots of FMV and minigames, as well as the standard JRPG party size shrinking from 4 to 3.
*: Related to the above: Endangered/Extinct genres. Text adventures stopped appearing a long time ago, and there was a while when 2D platformers became extremely rare, especially on home consoles (the SNES had far more 2D platformers than the Nintendo 64, for example).

(In case you haven't noticed, many of the changes I mentioned above actually occurred around the same time, although I believe PCs got CD-ROM games earlier.)

I really don't understand this useless, counterproductive argument.
An old game can be total crap and a new game can be excellent. Or viceversa.
So enjoy your games, both old and news!

I think that while was four years ago by now, which is half the time of GOG's existence ...

I spent over $120 picking up close to 100 (99 specifically) different games since this sale started. Nearly every one being what would be fitting of the old Good OLD Games moniker.

So I'd say this sale went down well for classic gamers. Maybe you either did not look hard enough (try searching the store with filters maybe? it helped me big time). Or maybe you already own too much of the classic selection.

A billion! A billion years old!

Last time I looked, the banner on the front page said "SUMMER sale", not "Good Old Games Sale"...