socalgamer: Ok so a bit of a rant- Gog has good sales from time to time. BUT limited AAA game choices compared to Steam. Why? Like games from Dishonored are not available even old AAA games.
One pertinent issue is that most companies are discovering how lucrative having your own digital store-front is. Now you may ask, why release on Steam then? That's because that is where a massive majority of PC gamers are. But those who can, large publishers with confidence like EA for example, lock their games to their own store.
GOG has a nice-sized gamer base for an alternative store-front, but they are not near massive majority status yet, and thus this makes releasing here optional.
Not to worry, GOG on their own are doing their best to negotiate Triple AAA (and indie) releases to their store. In the "trip to the headquarters" thread, GOG mentioned that they doing well, but that their market-share needs to grow more for publishers/developers to want to release Triple AAA games on Day 1, for example.
So, one thing that can be done is to continue buying other games on GOG here when you can. It all adds up to seeing the Triple AAA releases you want here!