What i don't get is why i'm forced to be online to install the game even if i have the retail version...
Because when Larian sent the master DVD to the factory three or four weeks ago, they didn't say "well, that's our job done, let's go to the pub." they kept working on the game up to and past the day of release.
In my opinion, this is a good thing! I remember buying games in the 80's and 90's where bugs were simply never fixed. I don't want to go back to that model of sales.