Welcome:)
Here are the answers:
To make games available on GOG.com we need to contact rights owners, usually publishers, but also quite often directly developers and persuade them to sell us their games. When it is done we sign a deal, guarantee minimal incomes (here comes our expenses, and our hope that enough people will buy prepaid games;). Of course our tech team has to make sure that games will work on modern OS, this take some additional efforts. Same arranging additional materials like guides, wallpapers, soundtracks. And here new title come;)
The most difficult task is to persuade different companies to take money from us (usually developers are more keen to get additional revenues), especially that the bigger company is, the more frightened is that due to lack of DRM somebody will stole their 5-10 bucks, 5-15 years old games and distribute it freely in the internet (somehow they don't realize that they are already available in the net from the date of the release;)
But we constantly and stubbornly knock to different doors asking for content and step by step we manage to build our catalog.
Regarding games we add. We basically using our knowledge and we browse our wishlist. Basically we look for titles which were remembered.
And regarding Outlaws from Lucasarts. That’s though one. I mean Lucas;) We, of course, knocked those doors too, but I wouldn’t expect to have Lucas games soon.
I the meantime;) enjoy our current selection. More games are coming every week. Nearest are not FPS, but pretty nice adventures, but then, who knows;)

:)) One post, two answers, same time. Thanks LordZ:)

I don't know how we exactly protect ourselves in contracts. But I just assume that, as usually, all contracts can be terminated on certain conditions. So I think that it is theoretically possible.
Actually beside kind of "political" or some totally unpredictable reasons I don't see why anybody would terminate contracts with us. We provide absolutely additional stream of revenue without additional work/efforts from suppliers.
Of course in this hypothetical situation our duty would be to protect rights of our customers. Meaning either money back or/and earlier notice that the game won't be backuped by gog.com anymore and if you wish to have it please make back up copy by yourself. Or something similar (I just inventing right now;)

Sure, sure. It is already happening. The more site is known, the more we sell, the easier is to attract new suppliers. First companies had to rely solely on our word and reputation as a company (known from other gaming businesses), now we have certain data, and stats to show how many units we can sold, what kind of revenue we can bring.
Also, the more we know about ourselves the easier is to negotiate. When we were buying first games we were proposing minimal guarantees basing on totally science fiction scenarios invented by us:) Now we can be bit more brave in proposing numbers cause we have much better ways to estimate their potential.
So yes, yes, yes:)
Hopefully it will be visible in our catalog next year:)

You know, even CDProjekt is 15 years old now we preserve small business culture and we still kind of bunch young guys, more gamers than business folks, so we just behave the way we wanted other companies to behave towards us as customers. No big magic;) And we don't have any corporate policies to hide behind them we just have our common sense which drive us, hopefully in right direction, actually I strongly believe that it driving us in the very right direction;)

hehee:) I didn't meant necessarily next week;) ..but yeah some nice
adventure games should show up soon (not LA though;)