A modder named Drew Rechner has finished a seven year project - recreating the entirety of Baldur’s Gate as a mod for Neverwinter Nights 2, calling it Baldur’s Gate: Reloaded.
While the mod is free, it requires Neverwinter Nights 2 and all three of its expansions to play. Fortunately, GoG.com is selling the entire kit-and-kaboodle as a $20 bundle.
Check out the trailer for the mod in the video below.