Rincewind81: GOGs and Larians intended release Date vof Original Sin here was "End of August" because of the Galaxy integration. I already bought it and didn't played much, want to start now and don't want to miss the Galaxy Achievements - if available...
So, we have midst of September now and no sign of a Galaxy release... Can I start playing because an more or less open beta will is still month away or are we talking about days or weeks?
While I can't say anything regarding possible Galaxy-Achievements - I can point you to this article on GameStar.de:
http://www.gamestar.de/spiele/divinity-original-sin/news/divinity_original_sin,48271,3078354.html They say, in the new patch is a free DLC included ("The bear and the burglar"), which adds two new compagnions.
The catch is - you have to start anew...because the DLC will not work with the old savegames.
So - good for players, who waited for now, I guess...I'll wait a little longer and see, what there is still to come.
Nice, that they add new stuff - not so nice, that you have to start all over again, whenever they add something.