Please do not listen to stonebro :) Risen is excellent, but if you are new to open world RPG's, or even if you arn't, Risen will send you running with your tail between your legs, and almost certainly ruin your view of open world RPG's. It is, to use a crap metaphor, like the deep end of the swimming pool. Better to start with something less exciting, less interesting, but more fathomable, like Morrowind. I would recomend Risen, but not to whet the palette with.
As for Two Worlds, it's been said several times, but it's worth repeating, the voice acting is AWFUL. To be fair, this is in part to do with the terrible localisation (you can't just put the words verily, forsooth or prey randomly into a sentence like you are punctuating the sentence with them.) However, the main character is worth listening to for being hilariously bad, it's as if the guy doing the voice work has no idea what inflection to put into the voice at any given time, leading to some awesome moments. Apparently they will be hiring professional voice actors for the sequel, although not even pro's would not have been able to save the cack-handed localisation.
Apart from the voice acting, it is actually a good game, despite a VERY rocky opening: the voice acting doesent help of course, nor does the fact that right after the character customisation screen, you are 'treated' to a pre-rendered cinematic, where you will clearly see the main character, who will look nothing like what you envisioned, if only because he doesen't look like the default character either. You are then dumped into the opening dungeon consisting of two enemies (that's right, two whole enemies, you brave warrior.)
However, inspite of this rocky 20 minutes, if you persist, it gets really good, with a nice, simple yet really dynamic character development system, althouth the reputation system it touts never really gets going. Combat, again, is rather simple, but quite dynamic with the addition of magic.
The only other thing I would add is the high system requirements. Don't believe what you read anywhere else, to get this game to run at a decent clip, you will need at least a 2.0 GHZ dual core processor, 2GB of ram and a video card with 256 MB of ram, maybe even 512 to be on the safe side. I would recommend this game, just don't go in expecting a polished masterpiece.

did they patch in more women?
It seemed scary to have a world where men outnumbered the women 100000000 to 1.

Same problem here, I download it with the GoG downloader, everything when fine but when I tried to install it the integrity checker fail...

How many of the people whining about this game have actually played it?
I mean given it an honest chance, not played for 5 seconds, raged, and went back to Oblivion?
This is NOT Oblivion, nor does it try to be.
Yes, some aspects are less than ideal. Others are downright laughably bad. But there is NO better sandbox RPG out there. Everything else imposes senseless limits. Two Worlds lets you jack your character up to insane levels, if you so desire. There are permanent effect potions to be made, you can combine weapons an infinite number of times, etc. Basically, you can do whatever you want.
If you play Two Worlds for Two Worlds, not expecting it to be something else, there's a lot of fun to be had. On top of that, what other RPG, especially of this scale, has multiplayer?
Old? Who cares?
Good, to some, absolutely.
This was my most anticipated release on GOG since I saw that TopWare was on-board.

Have you actually played Oblivion, or did you play it for 5 seconds, raged, and went back to Two Worlds?
You can do all those things in far better games. (Oblivion, Fallout 3, Morrorwind, Etc, Etc)

You sure can't do all of those things. Obviously you haven't played the games you're referencing.
Oblivion scales the NPCs with your level, so even if you could do those things (You can't) it would be meaningless.
Fallout 3 and Morrowind (not Morrorwind), do not allow any permanent stat boosts outside of maybe a few unique instances.
None of these allow weapons to be combined.
FYI though, I've put about 200 hours into Oblivion across different platforms, Probably 50+ into Fallout 3, I'm not sure how many into Morrowind, as that was a good while ago, if I had to guess, I'd assume low and say 30 - 40 hours.

Thanks. Glad i don't have to download all the files again.

Strange, but I thought GOG stood for releasing Good Old Games. You know, the games that were awesome back in the day, but that are no longer widely available legally and updated to run on modern systems without DRM. I had no idea it actually stood for badly received rather new games... you know, games not really many people really cared for, made for modern systems just a few years ago.
Don't get me wrong, I don't mind that they are releasing this. I mean, I might get it at some point, but if I don't they're not forcing me to download it. And obviously some people do want to get it. Still, saying this game is a good example of why GOG came into being is really stretching it.

Obviously you haven't heard of permanent stat boosting spells in Morrowind.
But you are right about Fallout 3 and Oblivion not having permanent stat boosting, I guess in my mind I thought Items and armor boosted stats (Which they do, unless you take them off)
And I guess MAKING your own weapons via enchantment is far worse than combining them....
Thank you for listing how many hours you have sunk into the games.

How about the soundtrack being listed on the frontpage, but not actually available?

Fact of the matter is, those are still very limited in comparison. Stat boosts from basic armour are nothing compared to what you can do in Two Worlds. Play the game, Seriously.

Actually I am tempted to say that 5 seconds is the ideal play time for Oblivion... it's when you try to play it for more that things starts to goes horribly wrong...

I'll wishlist it for now, mainly because I have so many other RPGs I haven't finished yet. But I'm sure I will buy it sometime down the line. Bad voice acting is hardly a deal killer for me. Baldur's Gate had some of the cheesiest voice acting ever heard in a PC game, but it's still a great classic.

Aww, that's not the fix I was hoping for. :(