|Baldur's Gate EE installation|
Baldur's Gate Enhanced Edition installs on Ubuntu 13.04 64-bit without problems using Wine. The problem comes when you run the game. Everything seems to work fine except there's this black screen with just the mouse pointer and you can hear the game music playing.
If you get that, you're on Wine 1.4. To fix this, you'll want to install the development version of Wine (1.5.x).
~$ sudo add-apt-repository ppa:ubuntu-wine/ppa
~$ sudo apt-get update
~$ sudo apt-get install wine1.5
The game should run fine now except the occasional minor glitches. Those might be game bugs rather than Wine bugs but they're just annoying and don't prevent you from playing.